diff --git a/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.js b/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.js
index 95bfad5..6f16dcd 100644
--- a/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.js
+++ b/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.js
@@ -94,7 +94,7 @@
 	},
 
 	allocated_amount: function() {
-		this.calculate_total_advance("Purchase Invoice", "advances");
+		this.calculate_total_advance();
 		this.frm.refresh_fields();
 	},
 
diff --git a/erpnext/accounts/doctype/sales_invoice/sales_invoice.js b/erpnext/accounts/doctype/sales_invoice/sales_invoice.js
index fac9442..5a1e258 100644
--- a/erpnext/accounts/doctype/sales_invoice/sales_invoice.js
+++ b/erpnext/accounts/doctype/sales_invoice/sales_invoice.js
@@ -167,7 +167,7 @@
 	},
 
 	allocated_amount: function() {
-		this.calculate_total_advance("Sales Invoice", "advances");
+		this.calculate_total_advance();
 		this.frm.refresh_fields();
 	},
 
@@ -176,8 +176,7 @@
 			frappe.model.round_floats_in(this.frm.doc, ["grand_total", "paid_amount"]);
 			// this will make outstanding amount 0
 			this.frm.set_value("write_off_amount",
-				flt(this.frm.doc.grand_total - this.frm.doc.paid_amount,
-					precision("write_off_amount"))
+				flt(this.frm.doc.grand_total - this.frm.doc.paid_amount, precision("write_off_amount"))
 			);
 		}
 
@@ -249,7 +248,7 @@
 	if(doc.is_pos) {
 		return cur_frm.call({
 			method: "erpnext.accounts.doctype.sales_invoice.sales_invoice.get_bank_cash_account",
-			args: { 
+			args: {
 				"mode_of_payment": doc.mode_of_payment,
 				"company": doc.company
 			 },
diff --git a/erpnext/buying/doctype/purchase_common/purchase_common.js b/erpnext/buying/doctype/purchase_common/purchase_common.js
index 544a17a..376b287 100644
--- a/erpnext/buying/doctype/purchase_common/purchase_common.js
+++ b/erpnext/buying/doctype/purchase_common/purchase_common.js
@@ -2,8 +2,9 @@
 // License: GNU General Public License v3. See license.txt
 
 frappe.provide("erpnext.buying");
-frappe.require("assets/erpnext/js/transaction.js");
-{% include "public/js/controllers/accounts.js" %}
+frappe.require("assets/erpnext/js/controllers/transaction.js");
+
+{% include "public/js/controllers/accounts.js" %};
 
 cur_frm.email_field = "contact_email";
 
@@ -171,27 +172,6 @@
 		}
 	},
 
-	calculate_taxes_and_totals: function() {
-		this._super();
-		this.calculate_total_advance("Purchase Invoice", "advances");
-		this.frm.refresh_fields();
-	},
-
-	calculate_item_values: function() {
-		var me = this;
-
-		$.each(this.frm.doc["items"] || [], function(i, item) {
-			frappe.model.round_floats_in(item);
-			item.amount = flt(item.rate * item.qty, precision("amount", item));
-			item.item_tax_amount = 0.0;
-
-			me._set_in_company_currency(item, "price_list_rate", "base_price_list_rate");
-			me._set_in_company_currency(item, "rate", "base_rate");
-			me._set_in_company_currency(item, "amount", "base_amount");
-		});
-
-	},
-
 	calculate_net_total: function() {
 		var me = this;
 
@@ -249,27 +229,6 @@
 			this.frm.doc.conversion_rate, precision("other_charges_deducted_import"));
 	},
 
-	_cleanup: function() {
-		this._super();
-		this.frm.doc.in_words = this.frm.doc.in_words_import = "";
-
-		if(this.frm.doc["items"].length) {
-			if(!frappe.meta.get_docfield(this.frm.doc["items"][0].doctype, "item_tax_amount", this.frm.doctype)) {
-				$.each(this.frm.doc["items"] || [], function(i, item) {
-					delete item["item_tax_amount"];
-				});
-			}
-		}
-
-		if(this.frm.doc["taxes"].length) {
-			if(!frappe.meta.get_docfield(this.frm.doc["taxes"][0].doctype, "tax_amount_after_discount_amount", this.frm.doctype)) {
-				$.each(this.frm.doc["taxes"] || [], function(i, tax) {
-					delete tax["tax_amount_after_discount_amount"];
-				});
-			}
-		}
-	},
-
 	calculate_outstanding_amount: function() {
 		if(this.frm.doc.doctype == "Purchase Invoice" && this.frm.doc.docstatus < 2) {
 			frappe.model.round_floats_in(this.frm.doc, ["grand_total", "total_advance", "write_off_amount"]);
diff --git a/erpnext/public/js/controllers/taxes_and_totals.js b/erpnext/public/js/controllers/taxes_and_totals.js
new file mode 100644
index 0000000..52a22c3
--- /dev/null
+++ b/erpnext/public/js/controllers/taxes_and_totals.js
@@ -0,0 +1,354 @@
+// Copyright (c) 2013, Web Notes Technologies Pvt. Ltd. and Contributors
+// License: GNU General Public License v3. See license.txt
+
+frappe.provide("erpnext");
+frappe.require("assets/erpnext/js/controllers/stock_controller.js");
+
+erpnext.taxes_and_totals = erpnext.stock.StockController.extend({
+	calculate_taxes_and_totals: function(update_paid_amount) {
+		this.discount_amount_applied = false;
+		this._calculate_taxes_and_totals();
+		if (frappe.meta.get_docfield(this.frm.doc.doctype, "discount_amount"))
+			this.apply_discount_amount();
+
+		// Advance calculation applicable to Sales /Purchase Invoice
+		if(in_list(["Sales Invoice", "Purchase Invoice"], this.frm.doc.doctype) && this.frm.doc.docstatus < 2) {
+			this.calculate_total_advance(update_paid_amount);
+		}
+
+		// Sales person's commission
+		if(in_list(["Quotation", "Sales Order", "Delivery Note", "Sales Invoice"])) {
+			this.calculate_commission();
+			this.calculate_contribution();
+		}
+
+		this.frm.refresh_fields();
+	},
+
+	_calculate_taxes_and_totals: function() {
+		this.validate_conversion_rate();
+		this.calculate_item_values();
+		this.initialize_taxes();
+		this.determine_exclusive_rate();
+		this.calculate_net_total();
+		this.calculate_taxes();
+		this.calculate_totals();
+		this._cleanup();
+		this.show_item_wise_taxes();
+	},
+
+	initialize_taxes: function() {
+		var me = this;
+
+		$.each(this.frm.doc["taxes"] || [], function(i, tax) {
+			tax.item_wise_tax_detail = {};
+			tax_fields = ["total", "tax_amount_after_discount_amount",
+				"tax_amount_for_current_item", "grand_total_for_current_item",
+				"tax_fraction_for_current_item", "grand_total_fraction_for_current_item"]
+
+			if (!me.discount_amount_applied)
+				tax_fields.push("tax_amount");
+
+			$.each(tax_fields, function(i, fieldname) { tax[fieldname] = 0.0 });
+
+			me.validate_on_previous_row(tax);
+			me.validate_inclusive_tax(tax);
+			frappe.model.round_floats_in(tax);
+		});
+	},
+
+	calculate_taxes: function() {
+		var me = this;
+		var actual_tax_dict = {};
+
+		// maintain actual tax rate based on idx
+		$.each(this.frm.doc["taxes"] || [], function(i, tax) {
+			if (tax.charge_type == "Actual") {
+				actual_tax_dict[tax.idx] = flt(tax.rate, precision("tax_amount", tax));
+			}
+		});
+
+		$.each(this.frm.doc["items"] || [], function(n, item) {
+			var item_tax_map = me._load_item_tax_rate(item.item_tax_rate);
+
+			$.each(me.frm.doc["taxes"] || [], function(i, tax) {
+				// tax_amount represents the amount of tax for the current step
+				var current_tax_amount = me.get_current_tax_amount(item, tax, item_tax_map);
+
+				// Adjust divisional loss to the last item
+				if (tax.charge_type == "Actual") {
+					actual_tax_dict[tax.idx] -= current_tax_amount;
+					if (n == me.frm.doc["items"].length - 1) {
+						current_tax_amount += actual_tax_dict[tax.idx]
+					}
+				}
+
+				// store tax_amount for current item as it will be used for
+				// charge type = 'On Previous Row Amount'
+				tax.tax_amount_for_current_item = current_tax_amount;
+
+				// accumulate tax amount into tax.tax_amount
+				if (!me.discount_amount_applied)
+					tax.tax_amount += current_tax_amount;
+
+				tax.tax_amount_after_discount_amount += current_tax_amount;
+
+				// for buying
+				if(tax.category) {
+					// if just for valuation, do not add the tax amount in total
+					// hence, setting it as 0 for further steps
+					current_tax_amount = (tax.category == "Valuation") ? 0.0 : current_tax_amount;
+
+					current_tax_amount *= (tax.add_deduct_tax == "Deduct") ? -1.0 : 1.0;
+				}
+
+				// Calculate tax.total viz. grand total till that step
+				// note: grand_total_for_current_item contains the contribution of
+				// item's amount, previously applied tax and the current tax on that item
+				if(i==0) {
+					tax.grand_total_for_current_item = flt(item.base_amount + current_tax_amount,
+						precision("total", tax));
+				} else {
+					tax.grand_total_for_current_item =
+						flt(me.frm.doc["taxes"][i-1].grand_total_for_current_item + current_tax_amount,
+							precision("total", tax));
+				}
+
+				// in tax.total, accumulate grand total for each item
+				tax.total += tax.grand_total_for_current_item;
+
+				// set precision in the last item iteration
+				if (n == me.frm.doc["items"].length - 1) {
+					me.round_off_totals(tax);
+
+					// adjust Discount Amount loss in last tax iteration
+					if ((i == me.frm.doc["taxes"].length - 1) && me.discount_amount_applied)
+						me.adjust_discount_amount_loss(tax);
+				}
+			});
+		});
+	},
+
+	round_off_totals: function(tax) {
+		tax.total = flt(tax.total, precision("total", tax));
+		tax.tax_amount = flt(tax.tax_amount, precision("tax_amount", tax));
+		tax.tax_amount_after_discount_amount = flt(tax.tax_amount_after_discount_amount,
+			precision("tax_amount", tax));
+	},
+
+	adjust_discount_amount_loss: function(tax) {
+		var discount_amount_loss = this.frm.doc.grand_total - flt(this.frm.doc.base_discount_amount) - tax.total;
+		tax.tax_amount_after_discount_amount = flt(tax.tax_amount_after_discount_amount +
+			discount_amount_loss, precision("tax_amount", tax));
+		tax.total = flt(tax.total + discount_amount_loss, precision("total", tax));
+	},
+
+	get_current_tax_amount: function(item, tax, item_tax_map) {
+		var tax_rate = this._get_tax_rate(tax, item_tax_map);
+		var current_tax_amount = 0.0;
+
+		if(tax.charge_type == "Actual") {
+			// distribute the tax amount proportionally to each item row
+			var actual = flt(tax.rate, precision("tax_amount", tax));
+			current_tax_amount = this.frm.doc.net_total ?
+			((item.base_amount / this.frm.doc.net_total) * actual) : 0.0;
+
+		} else if(tax.charge_type == "On Net Total") {
+			current_tax_amount = (tax_rate / 100.0) * item.base_amount;
+
+		} else if(tax.charge_type == "On Previous Row Amount") {
+			current_tax_amount = (tax_rate / 100.0) *
+				this.frm.doc["taxes"][cint(tax.row_id) - 1].tax_amount_for_current_item;
+
+		} else if(tax.charge_type == "On Previous Row Total") {
+			current_tax_amount = (tax_rate / 100.0) *
+				this.frm.doc["taxes"][cint(tax.row_id) - 1].grand_total_for_current_item;
+		}
+
+		current_tax_amount = flt(current_tax_amount, precision("tax_amount", tax));
+
+		// store tax breakup for each item
+		tax.item_wise_tax_detail[item.item_code || item.item_name] = [tax_rate, current_tax_amount];
+
+		return current_tax_amount;
+	},
+
+	_cleanup: function() {
+		this.frm.doc.in_words = this.frm.doc.in_words_import = this.frm.doc.in_words_export = "";
+
+		if(this.frm.doc["items"] && this.frm.doc["items"].length) {
+			if(!frappe.meta.get_docfield(this.frm.doc["items"][0].doctype, "item_tax_amount", this.frm.doctype)) {
+				$.each(this.frm.doc["items"] || [], function(i, item) {
+					delete item["item_tax_amount"];
+				});
+			}
+		}
+
+
+		if(this.frm.doc["taxes"] && this.frm.doc["taxes"].length) {
+			var temporary_fields = ["tax_amount_for_current_item", "grand_total_for_current_item",
+				"tax_fraction_for_current_item", "grand_total_fraction_for_current_item"]
+
+			if(!frappe.meta.get_docfield(this.frm.doc["taxes"][0].doctype, "tax_amount_after_discount_amount", this.frm.doctype)) {
+				temporary_fields.push("tax_amount_after_discount_amount");
+			}
+
+			$.each(this.frm.doc["taxes"] || [], function(i, tax) {
+				$.each(temporary_fields, function(i, fieldname) {
+					delete tax[fieldname];
+				});
+
+				tax.item_wise_tax_detail = JSON.stringify(tax.item_wise_tax_detail);
+			});
+		}
+	},
+
+
+	calculate_total_advance: function(update_paid_amount) {
+		this.frm.doc.total_advance = flt(frappe.utils.sum(
+			$.map(this.frm.doc["advances"] || [], function(adv) { return adv.allocated_amount })
+		), precision("total_advance"));
+
+		this.calculate_outstanding_amount(update_paid_amount);
+	},
+
+	calculate_item_values: function() {
+		var me = this;
+
+		if (!this.discount_amount_applied) {
+			$.each(this.frm.doc["items"] || [], function(i, item) {
+				frappe.model.round_floats_in(item);
+				item.amount = flt(item.rate * item.qty, precision("amount", item));
+				item.item_tax_amount = 0.0;
+
+				$.each(["price_list_rate", "rate", "amount"], function(i, f) {
+					item["base_" + f] = flt(item[f] * me.frm.doc.conversion_rate, precision("base_" + f, item));
+				})
+			});
+		}
+	},
+
+	_load_item_tax_rate: function(item_tax_rate) {
+		return item_tax_rate ? JSON.parse(item_tax_rate) : {};
+	},
+
+	_get_tax_rate: function(tax, item_tax_map) {
+		return (keys(item_tax_map).indexOf(tax.account_head) != -1) ?
+			flt(item_tax_map[tax.account_head], precision("rate", tax)) :
+			tax.rate;
+	},
+
+	apply_discount_amount: function() {
+		var me = this;
+		var distributed_amount = 0.0;
+
+		if (this.frm.doc.discount_amount) {
+			this.frm.set_value("base_discount_amount",
+				flt(this.frm.doc.discount_amount * this.frm.doc.conversion_rate, precision("base_discount_amount")))
+
+			var grand_total_for_discount_amount = this.get_grand_total_for_discount_amount();
+			// calculate item amount after Discount Amount
+			if (grand_total_for_discount_amount) {
+				$.each(this.frm.doc["items"] || [], function(i, item) {
+					distributed_amount = flt(me.frm.doc.base_discount_amount) * item.base_amount / grand_total_for_discount_amount;
+					item.base_amount = flt(item.base_amount - distributed_amount, precision("base_amount", item));
+				});
+
+				this.discount_amount_applied = true;
+				this._calculate_taxes_and_totals();
+			}
+		} else {
+			this.frm.set_value("base_discount_amount", 0);
+		}
+	},
+
+	get_grand_total_for_discount_amount: function() {
+		var me = this;
+		var total_actual_tax = 0.0;
+		var actual_taxes_dict = {};
+
+		$.each(this.frm.doc["taxes"] || [], function(i, tax) {
+			if (tax.charge_type == "Actual")
+				actual_taxes_dict[tax.idx] = tax.tax_amount;
+			else if (actual_taxes_dict[tax.row_id] !== null) {
+				actual_tax_amount = flt(actual_taxes_dict[tax.row_id]) * flt(tax.rate) / 100;
+				actual_taxes_dict[tax.idx] = actual_tax_amount;
+			}
+		});
+
+		$.each(actual_taxes_dict, function(key, value) {
+			if (value)
+				total_actual_tax += value;
+		});
+
+		grand_total_for_discount_amount = flt(this.frm.doc.grand_total - total_actual_tax,
+			precision("grand_total"));
+		return grand_total_for_discount_amount;
+	},
+
+
+	determine_exclusive_rate: function() {
+		if(!in_list(["Quotation", "Sales Order", "Delivery Note", "Sales Invoice"])) return;
+
+		var me = this;
+		$.each(me.frm.doc["items"] || [], function(n, item) {
+			var item_tax_map = me._load_item_tax_rate(item.item_tax_rate);
+			var cumulated_tax_fraction = 0.0;
+
+			$.each(me.frm.doc["taxes"] || [], function(i, tax) {
+				tax.tax_fraction_for_current_item = me.get_current_tax_fraction(tax, item_tax_map);
+
+				if(i==0) {
+					tax.grand_total_fraction_for_current_item = 1 + tax.tax_fraction_for_current_item;
+				} else {
+					tax.grand_total_fraction_for_current_item =
+						me.frm.doc["taxes"][i-1].grand_total_fraction_for_current_item +
+						tax.tax_fraction_for_current_item;
+				}
+
+				cumulated_tax_fraction += tax.tax_fraction_for_current_item;
+			});
+
+			if(cumulated_tax_fraction && !me.discount_amount_applied) {
+				item.base_amount = flt(
+					(item.amount * me.frm.doc.conversion_rate) / (1 + cumulated_tax_fraction),
+					precision("base_amount", item));
+
+				item.base_rate = flt(item.base_amount / item.qty, precision("base_rate", item));
+
+				if(item.discount_percentage == 100) {
+					item.base_price_list_rate = item.base_rate;
+					item.base_rate = 0.0;
+				} else {
+					item.base_price_list_rate = flt(item.base_rate / (1 - item.discount_percentage / 100.0),
+						precision("base_price_list_rate", item));
+				}
+			}
+		});
+	},
+
+	get_current_tax_fraction: function(tax, item_tax_map) {
+		// Get tax fraction for calculating tax exclusive amount
+		// from tax inclusive amount
+		var current_tax_fraction = 0.0;
+
+		if(cint(tax.included_in_print_rate)) {
+			var tax_rate = this._get_tax_rate(tax, item_tax_map);
+
+			if(tax.charge_type == "On Net Total") {
+				current_tax_fraction = (tax_rate / 100.0);
+
+			} else if(tax.charge_type == "On Previous Row Amount") {
+				current_tax_fraction = (tax_rate / 100.0) *
+					this.frm.doc["taxes"][cint(tax.row_id) - 1].tax_fraction_for_current_item;
+
+			} else if(tax.charge_type == "On Previous Row Total") {
+				current_tax_fraction = (tax_rate / 100.0) *
+					this.frm.doc["taxes"][cint(tax.row_id) - 1].grand_total_fraction_for_current_item;
+			}
+		}
+
+		return current_tax_fraction;
+	},
+
+})
diff --git a/erpnext/public/js/transaction.js b/erpnext/public/js/controllers/transaction.js
similarity index 73%
rename from erpnext/public/js/transaction.js
rename to erpnext/public/js/controllers/transaction.js
index f202fb7..bff50f2 100644
--- a/erpnext/public/js/transaction.js
+++ b/erpnext/public/js/controllers/transaction.js
@@ -2,14 +2,12 @@
 // License: GNU General Public License v3. See license.txt
 
 frappe.provide("erpnext");
-frappe.require("assets/erpnext/js/controllers/stock_controller.js");
+frappe.require("assets/erpnext/js/controllers/taxes_and_totals.js");
 frappe.require("assets/erpnext/js/utils.js");
 
-
-erpnext.TransactionController = erpnext.stock.StockController.extend({
+erpnext.TransactionController = erpnext.taxes_and_totals.extend({
 	onload: function() {
 		var me = this;
-		this._super();
 
 		if(this.frm.doc.__islocal) {
 			var today = get_today(),
@@ -463,16 +461,6 @@
 		}
 	},
 
-	_load_item_tax_rate: function(item_tax_rate) {
-		return item_tax_rate ? JSON.parse(item_tax_rate) : {};
-	},
-
-	_get_tax_rate: function(tax, item_tax_map) {
-		return (keys(item_tax_map).indexOf(tax.account_head) != -1) ?
-			flt(item_tax_map[tax.account_head], precision("rate", tax)) :
-			tax.rate;
-	},
-
 	get_item_wise_taxes_html: function() {
 		var item_tax = {};
 		var tax_accounts = [];
@@ -570,188 +558,6 @@
 		}
 	},
 
-	calculate_taxes_and_totals: function() {
-		this.discount_amount_applied = false;
-		this._calculate_taxes_and_totals();
-		if (frappe.meta.get_docfield(this.frm.doc.doctype, "discount_amount"))
-			this.apply_discount_amount();
-	},
-
-	_calculate_taxes_and_totals: function() {
-		this.validate_conversion_rate();
-		this.calculate_item_values();
-		this.initialize_taxes();
-		this.determine_exclusive_rate && this.determine_exclusive_rate();
-		this.calculate_net_total();
-		this.calculate_taxes();
-		this.calculate_totals();
-		this._cleanup();
-		this.show_item_wise_taxes();
-	},
-
-	initialize_taxes: function() {
-		var me = this;
-
-		$.each(this.frm.doc["taxes"] || [], function(i, tax) {
-			tax.item_wise_tax_detail = {};
-			tax_fields = ["total", "tax_amount_after_discount_amount",
-				"tax_amount_for_current_item", "grand_total_for_current_item",
-				"tax_fraction_for_current_item", "grand_total_fraction_for_current_item"]
-
-			if (!me.discount_amount_applied)
-				tax_fields.push("tax_amount");
-
-			$.each(tax_fields, function(i, fieldname) { tax[fieldname] = 0.0 });
-
-			me.validate_on_previous_row(tax);
-			me.validate_inclusive_tax(tax);
-			frappe.model.round_floats_in(tax);
-		});
-	},
-
-	calculate_taxes: function() {
-		var me = this;
-		var actual_tax_dict = {};
-
-		// maintain actual tax rate based on idx
-		$.each(this.frm.doc["taxes"] || [], function(i, tax) {
-			if (tax.charge_type == "Actual") {
-				actual_tax_dict[tax.idx] = flt(tax.rate, precision("tax_amount", tax));
-			}
-		});
-
-		$.each(this.frm.doc["items"] || [], function(n, item) {
-			var item_tax_map = me._load_item_tax_rate(item.item_tax_rate);
-
-			$.each(me.frm.doc["taxes"] || [], function(i, tax) {
-				// tax_amount represents the amount of tax for the current step
-				var current_tax_amount = me.get_current_tax_amount(item, tax, item_tax_map);
-
-				// Adjust divisional loss to the last item
-				if (tax.charge_type == "Actual") {
-					actual_tax_dict[tax.idx] -= current_tax_amount;
-					if (n == me.frm.doc["items"].length - 1) {
-						current_tax_amount += actual_tax_dict[tax.idx]
-					}
-				}
-
-				// store tax_amount for current item as it will be used for
-				// charge type = 'On Previous Row Amount'
-				tax.tax_amount_for_current_item = current_tax_amount;
-
-				// accumulate tax amount into tax.tax_amount
-				if (!me.discount_amount_applied)
-					tax.tax_amount += current_tax_amount;
-
-				tax.tax_amount_after_discount_amount += current_tax_amount;
-
-				// for buying
-				if(tax.category) {
-					// if just for valuation, do not add the tax amount in total
-					// hence, setting it as 0 for further steps
-					current_tax_amount = (tax.category == "Valuation") ? 0.0 : current_tax_amount;
-
-					current_tax_amount *= (tax.add_deduct_tax == "Deduct") ? -1.0 : 1.0;
-				}
-
-				// Calculate tax.total viz. grand total till that step
-				// note: grand_total_for_current_item contains the contribution of
-				// item's amount, previously applied tax and the current tax on that item
-				if(i==0) {
-					tax.grand_total_for_current_item = flt(item.base_amount + current_tax_amount,
-						precision("total", tax));
-				} else {
-					tax.grand_total_for_current_item =
-						flt(me.frm.doc["taxes"][i-1].grand_total_for_current_item + current_tax_amount,
-							precision("total", tax));
-				}
-
-				// in tax.total, accumulate grand total for each item
-				tax.total += tax.grand_total_for_current_item;
-
-				// set precision in the last item iteration
-				if (n == me.frm.doc["items"].length - 1) {
-					me.round_off_totals(tax);
-
-					// adjust Discount Amount loss in last tax iteration
-					if ((i == me.frm.doc["taxes"].length - 1) && me.discount_amount_applied)
-						me.adjust_discount_amount_loss(tax);
-				}
-			});
-		});
-	},
-
-	round_off_totals: function(tax) {
-		tax.total = flt(tax.total, precision("total", tax));
-		tax.tax_amount = flt(tax.tax_amount, precision("tax_amount", tax));
-		tax.tax_amount_after_discount_amount = flt(tax.tax_amount_after_discount_amount,
-			precision("tax_amount", tax));
-	},
-
-	adjust_discount_amount_loss: function(tax) {
-		var discount_amount_loss = this.frm.doc.grand_total - flt(this.frm.doc.base_discount_amount) - tax.total;
-		tax.tax_amount_after_discount_amount = flt(tax.tax_amount_after_discount_amount +
-			discount_amount_loss, precision("tax_amount", tax));
-		tax.total = flt(tax.total + discount_amount_loss, precision("total", tax));
-	},
-
-	get_current_tax_amount: function(item, tax, item_tax_map) {
-		var tax_rate = this._get_tax_rate(tax, item_tax_map);
-		var current_tax_amount = 0.0;
-
-		if(tax.charge_type == "Actual") {
-			// distribute the tax amount proportionally to each item row
-			var actual = flt(tax.rate, precision("tax_amount", tax));
-			current_tax_amount = this.frm.doc.net_total ?
-			((item.base_amount / this.frm.doc.net_total) * actual) : 0.0;
-
-		} else if(tax.charge_type == "On Net Total") {
-			current_tax_amount = (tax_rate / 100.0) * item.base_amount;
-
-		} else if(tax.charge_type == "On Previous Row Amount") {
-			current_tax_amount = (tax_rate / 100.0) *
-				this.frm.doc["taxes"][cint(tax.row_id) - 1].tax_amount_for_current_item;
-
-		} else if(tax.charge_type == "On Previous Row Total") {
-			current_tax_amount = (tax_rate / 100.0) *
-				this.frm.doc["taxes"][cint(tax.row_id) - 1].grand_total_for_current_item;
-		}
-
-		current_tax_amount = flt(current_tax_amount, precision("tax_amount", tax));
-
-		// store tax breakup for each item
-		tax.item_wise_tax_detail[item.item_code || item.item_name] = [tax_rate, current_tax_amount];
-
-		return current_tax_amount;
-	},
-
-	_cleanup: function() {
-		$.each(this.frm.doc["taxes"] || [], function(i, tax) {
-			$.each(["tax_amount_for_current_item", "grand_total_for_current_item",
-				"tax_fraction_for_current_item", "grand_total_fraction_for_current_item"],
-				function(i, fieldname) { delete tax[fieldname]; });
-
-			tax.item_wise_tax_detail = JSON.stringify(tax.item_wise_tax_detail);
-		});
-	},
-
-	calculate_total_advance: function(parenttype, advance_parentfield, update_paid_amount) {
-		if(this.frm.doc.doctype == parenttype && this.frm.doc.docstatus < 2) {
-			var advance_doclist = this.frm.doc[advance_parentfield] || [];
-			this.frm.doc.total_advance = flt(frappe.utils.sum(
-				$.map(advance_doclist, function(adv) { return adv.allocated_amount })
-			), precision("total_advance"));
-
-			this.calculate_outstanding_amount(update_paid_amount);
-		}
-	},
-
-	_set_in_company_currency: function(item, print_field, base_field) {
-		// set values in base currency
-		item[base_field] = flt(item[print_field] * this.frm.doc.conversion_rate,
-			precision(base_field, item));
-	},
-
 	get_terms: function() {
 		var me = this;
 		if(this.frm.doc.tc_name) {
diff --git a/erpnext/selling/sales_common.js b/erpnext/selling/sales_common.js
index 3c04874..43f51c0 100644
--- a/erpnext/selling/sales_common.js
+++ b/erpnext/selling/sales_common.js
@@ -3,9 +3,9 @@
 
 
 frappe.provide("erpnext.selling");
-frappe.require("assets/erpnext/js/transaction.js");
+frappe.require("assets/erpnext/js/controllers/transaction.js");
 
-{% include "public/js/controllers/accounts.js" %}
+{% include "public/js/controllers/accounts.js" %};
 
 cur_frm.email_field = "contact_email";
 
@@ -233,94 +233,6 @@
 		}
 	},
 
-	calculate_taxes_and_totals: function(update_paid_amount) {
-		this._super();
-		this.calculate_total_advance("Sales Invoice", "advances", update_paid_amount);
-		this.calculate_commission();
-		this.calculate_contribution();
-
-		// TODO check for custom_recalc in custom scripts of server
-
-		this.frm.refresh_fields();
-	},
-
-	calculate_item_values: function() {
-		var me = this;
-
-		if (!this.discount_amount_applied) {
-			$.each(this.frm.doc["items"] || [], function(i, item) {
-				frappe.model.round_floats_in(item);
-				item.amount = flt(item.rate * item.qty, precision("amount", item));
-
-				me._set_in_company_currency(item, "price_list_rate", "base_price_list_rate");
-				me._set_in_company_currency(item, "rate", "base_rate");
-				me._set_in_company_currency(item, "amount", "base_amount");
-			});
-		}
-	},
-
-	determine_exclusive_rate: function() {
-		var me = this;
-		$.each(me.frm.doc["items"] || [], function(n, item) {
-			var item_tax_map = me._load_item_tax_rate(item.item_tax_rate);
-			var cumulated_tax_fraction = 0.0;
-
-			$.each(me.frm.doc["taxes"] || [], function(i, tax) {
-				tax.tax_fraction_for_current_item = me.get_current_tax_fraction(tax, item_tax_map);
-
-				if(i==0) {
-					tax.grand_total_fraction_for_current_item = 1 + tax.tax_fraction_for_current_item;
-				} else {
-					tax.grand_total_fraction_for_current_item =
-						me.frm.doc["taxes"][i-1].grand_total_fraction_for_current_item +
-						tax.tax_fraction_for_current_item;
-				}
-
-				cumulated_tax_fraction += tax.tax_fraction_for_current_item;
-			});
-
-			if(cumulated_tax_fraction && !me.discount_amount_applied) {
-				item.base_amount = flt(
-					(item.amount * me.frm.doc.conversion_rate) / (1 + cumulated_tax_fraction),
-					precision("base_amount", item));
-
-				item.base_rate = flt(item.base_amount / item.qty, precision("base_rate", item));
-
-				if(item.discount_percentage == 100) {
-					item.base_price_list_rate = item.base_rate;
-					item.base_rate = 0.0;
-				} else {
-					item.base_price_list_rate = flt(item.base_rate / (1 - item.discount_percentage / 100.0),
-						precision("base_price_list_rate", item));
-				}
-			}
-		});
-	},
-
-	get_current_tax_fraction: function(tax, item_tax_map) {
-		// Get tax fraction for calculating tax exclusive amount
-		// from tax inclusive amount
-		var current_tax_fraction = 0.0;
-
-		if(cint(tax.included_in_print_rate)) {
-			var tax_rate = this._get_tax_rate(tax, item_tax_map);
-
-			if(tax.charge_type == "On Net Total") {
-				current_tax_fraction = (tax_rate / 100.0);
-
-			} else if(tax.charge_type == "On Previous Row Amount") {
-				current_tax_fraction = (tax_rate / 100.0) *
-					this.frm.doc["taxes"][cint(tax.row_id) - 1].tax_fraction_for_current_item;
-
-			} else if(tax.charge_type == "On Previous Row Total") {
-				current_tax_fraction = (tax_rate / 100.0) *
-					this.frm.doc["taxes"][cint(tax.row_id) - 1].grand_total_fraction_for_current_item;
-			}
-		}
-
-		return current_tax_fraction;
-	},
-
 	calculate_net_total: function() {
 		var me = this;
 		this.frm.doc.net_total = this.frm.doc.net_total_export = 0.0;
@@ -353,54 +265,6 @@
 		this.frm.doc.rounded_total_export = Math.round(this.frm.doc.grand_total_export);
 	},
 
-	apply_discount_amount: function() {
-		var me = this;
-		var distributed_amount = 0.0;
-
-		if (this.frm.doc.discount_amount) {
-			this.frm.set_value("base_discount_amount",
-				flt(this.frm.doc.discount_amount * this.frm.doc.conversion_rate, precision("base_discount_amount")))
-
-			var grand_total_for_discount_amount = this.get_grand_total_for_discount_amount();
-			// calculate item amount after Discount Amount
-			if (grand_total_for_discount_amount) {
-				$.each(this.frm.doc["items"] || [], function(i, item) {
-					distributed_amount = flt(me.frm.doc.base_discount_amount) * item.base_amount / grand_total_for_discount_amount;
-					item.base_amount = flt(item.base_amount - distributed_amount, precision("base_amount", item));
-				});
-
-				this.discount_amount_applied = true;
-				this._calculate_taxes_and_totals();
-			}
-		} else {
-			this.frm.set_value("base_discount_amount", 0);
-		}
-	},
-
-	get_grand_total_for_discount_amount: function() {
-		var me = this;
-		var total_actual_tax = 0.0;
-		var actual_taxes_dict = {};
-
-		$.each(this.frm.doc["taxes"] || [], function(i, tax) {
-			if (tax.charge_type == "Actual")
-				actual_taxes_dict[tax.idx] = tax.tax_amount;
-			else if (actual_taxes_dict[tax.row_id] !== null) {
-				actual_tax_amount = flt(actual_taxes_dict[tax.row_id]) * flt(tax.rate) / 100;
-				actual_taxes_dict[tax.idx] = actual_tax_amount;
-			}
-		});
-
-		$.each(actual_taxes_dict, function(key, value) {
-			if (value)
-				total_actual_tax += value;
-		});
-
-		grand_total_for_discount_amount = flt(this.frm.doc.grand_total - total_actual_tax,
-			precision("grand_total"));
-		return grand_total_for_discount_amount;
-	},
-
 	calculate_outstanding_amount: function(update_paid_amount) {
 		// NOTE:
 		// paid_amount and write_off_amount is only for POS Invoice
@@ -451,11 +315,6 @@
 			});
 	},
 
-	_cleanup: function() {
-		this._super();
-		this.frm.doc.in_words = this.frm.doc.in_words_export = "";
-	},
-
 	shipping_rule: function() {
 		var me = this;
 		if(this.frm.doc.shipping_rule) {