diff --git a/erpnext/buying/doctype/purchase_order_item/purchase_order_item.json b/erpnext/buying/doctype/purchase_order_item/purchase_order_item.json
index 51943a0..1a2842a 100755
--- a/erpnext/buying/doctype/purchase_order_item/purchase_order_item.json
+++ b/erpnext/buying/doctype/purchase_order_item/purchase_order_item.json
@@ -1169,7 +1169,7 @@
    "precision": "", 
    "print_hide": 0, 
    "print_hide_if_no_value": 0, 
-   "read_only": 0, 
+   "read_only": 1, 
    "remember_last_selected_value": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -1259,7 +1259,7 @@
    "precision": "", 
    "print_hide": 0, 
    "print_hide_if_no_value": 0, 
-   "read_only": 0, 
+   "read_only": 1, 
    "remember_last_selected_value": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -1897,7 +1897,7 @@
  "issingle": 0, 
  "istable": 1, 
  "max_attachments": 0, 
- "modified": "2017-11-30 14:17:15.817754", 
+ "modified": "2017-12-14 09:36:40.837027", 
  "modified_by": "Administrator", 
  "module": "Buying", 
  "name": "Purchase Order Item", 
diff --git a/erpnext/buying/doctype/supplier_quotation_item/supplier_quotation_item.json b/erpnext/buying/doctype/supplier_quotation_item/supplier_quotation_item.json
index 4c6375e..b3a55b6 100644
--- a/erpnext/buying/doctype/supplier_quotation_item/supplier_quotation_item.json
+++ b/erpnext/buying/doctype/supplier_quotation_item/supplier_quotation_item.json
@@ -1072,7 +1072,7 @@
    "precision": "", 
    "print_hide": 0, 
    "print_hide_if_no_value": 0, 
-   "read_only": 0, 
+   "read_only": 1, 
    "remember_last_selected_value": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -1162,7 +1162,7 @@
    "precision": "", 
    "print_hide": 0, 
    "print_hide_if_no_value": 0, 
-   "read_only": 0, 
+   "read_only": 1, 
    "remember_last_selected_value": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -1614,7 +1614,7 @@
  "issingle": 0, 
  "istable": 1, 
  "max_attachments": 0, 
- "modified": "2017-11-30 14:22:10.542868", 
+ "modified": "2017-12-14 09:37:47.427897", 
  "modified_by": "Administrator", 
  "module": "Buying", 
  "name": "Supplier Quotation Item", 
diff --git a/erpnext/controllers/taxes_and_totals.py b/erpnext/controllers/taxes_and_totals.py
index 0fe7f7c..07319a8 100644
--- a/erpnext/controllers/taxes_and_totals.py
+++ b/erpnext/controllers/taxes_and_totals.py
@@ -70,7 +70,6 @@
 				item.net_rate = item.rate
 				item.amount = flt(item.rate * item.qty,	item.precision("amount"))
 				item.net_amount = item.amount
-				item.total_weight = flt(item.weight_per_unit * item.qty)
 
 				self._set_in_company_currency(item, ["price_list_rate", "rate", "net_rate", "amount", "net_amount"])
 
@@ -164,13 +163,12 @@
 			return tax.rate
 
 	def calculate_net_total(self):
-		self.doc.total = self.doc.base_total = self.doc.net_total = self.doc.base_net_total = self.doc.total_net_weight= 0.0
+		self.doc.total = self.doc.base_total = self.doc.net_total = self.doc.base_net_total = 0.0
 		for item in self.doc.get("items"):
 			self.doc.total += item.amount
 			self.doc.base_total += item.base_amount
 			self.doc.net_total += item.net_amount
 			self.doc.base_net_total += item.base_net_amount
-			self.doc.total_net_weight += item.total_weight
 
 		self.doc.round_floats_in(self.doc, ["total", "base_total", "net_total", "base_net_total"])
 
diff --git a/erpnext/public/js/controllers/taxes_and_totals.js b/erpnext/public/js/controllers/taxes_and_totals.js
index 580e5fa..8abb8be 100644
--- a/erpnext/public/js/controllers/taxes_and_totals.js
+++ b/erpnext/public/js/controllers/taxes_and_totals.js
@@ -200,15 +200,14 @@
 
 	calculate_net_total: function() {
 		var me = this;
-		this.frm.doc.total = this.frm.doc.base_total = this.frm.doc.net_total = this.frm.doc.base_net_total = this.frm.doc.total_net_weight= 0.0;
+		this.frm.doc.total = this.frm.doc.base_total = this.frm.doc.net_total = this.frm.doc.base_net_total = 0.0;
 
 		$.each(this.frm.doc["items"] || [], function(i, item) {
 			me.frm.doc.total += item.amount;
 			me.frm.doc.base_total += item.base_amount;
 			me.frm.doc.net_total += item.net_amount;
 			me.frm.doc.base_net_total += item.base_net_amount;
-			me.frm.doc.total_net_weight += item.total_weight;
-		});
+			});
 
 
 		frappe.model.round_floats_in(this.frm.doc, ["total", "base_total", "net_total", "base_net_total"]);
diff --git a/erpnext/public/js/controllers/transaction.js b/erpnext/public/js/controllers/transaction.js
index e86435c..5cb1973 100644
--- a/erpnext/public/js/controllers/transaction.js
+++ b/erpnext/public/js/controllers/transaction.js
@@ -114,7 +114,7 @@
 		}
 
 		if(this.frm.fields_dict["items"]) {
-			this["items_remove"] = this.calculate_taxes_and_totals;
+			this["items_remove"] = this.calculate_net_weight;
 		}
 
 		if(this.frm.fields_dict["recurring_print_format"]) {
@@ -336,18 +336,23 @@
 
 					callback: function(r) {
 						if(!r.exc) {
-							me.frm.script_manager.trigger("price_list_rate", cdt, cdn);
-							me.toggle_conversion_factor(item);
-							if(show_batch_dialog && !frappe.flags.hide_serial_batch_dialog) {
-								var d = locals[cdt][cdn];
-								$.each(r.message, function(k, v) {
-									if(!d[k]) d[k] = v;
-								});
+							frappe.run_serially([
+								() => me.frm.script_manager.trigger("price_list_rate", cdt, cdn),
+								() => me.toggle_conversion_factor(item),
+								() => {
+									if(show_batch_dialog && !frappe.flags.hide_serial_batch_dialog) {
+										var d = locals[cdt][cdn];
+										$.each(r.message, function(k, v) {
+											if(!d[k]) d[k] = v;
+										});
 
-								erpnext.show_serial_batch_selector(me.frm, d, (item) => {
-									me.frm.script_manager.trigger('qty', item.doctype, item.name);
-								});
-							}
+										erpnext.show_serial_batch_selector(me.frm, d, (item) => {
+											me.frm.script_manager.trigger('qty', item.doctype, item.name);
+										});
+									}
+								},
+								() => me.conversion_factor(doc, cdt, cdn, true)
+							]);
 						}
 					}
 				});
@@ -663,8 +668,11 @@
 			var item = frappe.get_doc(cdt, cdn);
 			frappe.model.round_floats_in(item, ["qty", "conversion_factor"]);
 			item.stock_qty = flt(item.qty * item.conversion_factor, precision("stock_qty", item));
+			item.total_weight = flt(item.stock_qty * item.weight_per_unit);
 			refresh_field("stock_qty", item.name, item.parentfield);
+			refresh_field("total_weight", item.name, item.parentfield);
 			this.toggle_conversion_factor(item);
+			this.calculate_net_weight();
 			if (!dont_fetch_price_list_rate &&
 				frappe.meta.has_field(doc.doctype, "price_list_currency")) {
 				this.apply_price_list(item, true);
@@ -678,20 +686,24 @@
 			this.frm.fields_dict.items.grid.toggle_enable("conversion_factor",
 				(item.uom != item.stock_uom)? true: false);
 		}
+
 	},
 
 	qty: function(doc, cdt, cdn) {
 		this.conversion_factor(doc, cdt, cdn, true);
 		this.apply_pricing_rule(frappe.get_doc(cdt, cdn), true);
-		this.calculate_total_weight(doc, cdt, cdn, true);
 	},
 
-	calculate_total_weight: function(doc, cdt, cdn){
-		if(frappe.meta.get_docfield(cdt, "weight_per_unit", cdn)) {
-			var item = frappe.get_doc(cdt, cdn);
-			item.total_weight = flt(item.qty * item.weight_per_unit);
-			refresh_field("total_weight", item.name, item.parentfield);
-		}
+	calculate_net_weight: function(){
+		/* Calculate Total Net Weight then further applied shipping rule to calculate shipping charges.*/
+		var me = this;
+		this.frm.doc.total_net_weight= 0.0;
+
+		$.each(this.frm.doc["items"] || [], function(i, item) {
+			me.frm.doc.total_net_weight += flt(item.total_weight);
+		});
+		refresh_field("total_net_weight");
+		this.shipping_rule();
 	},
 
 	set_dynamic_labels: function() {
diff --git a/erpnext/selling/doctype/quotation_item/quotation_item.json b/erpnext/selling/doctype/quotation_item/quotation_item.json
index 16aa46c..4f5a295 100644
--- a/erpnext/selling/doctype/quotation_item/quotation_item.json
+++ b/erpnext/selling/doctype/quotation_item/quotation_item.json
@@ -1220,7 +1220,7 @@
    "precision": "", 
    "print_hide": 0, 
    "print_hide_if_no_value": 0, 
-   "read_only": 0, 
+   "read_only": 1, 
    "remember_last_selected_value": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -1310,7 +1310,7 @@
    "precision": "", 
    "print_hide": 0, 
    "print_hide_if_no_value": 0, 
-   "read_only": 0, 
+   "read_only": 1, 
    "remember_last_selected_value": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -1766,7 +1766,7 @@
  "istable": 1, 
  "max_attachments": 0, 
  "menu_index": 0, 
- "modified": "2017-11-30 13:58:52.861596", 
+ "modified": "2017-12-14 09:39:17.180709", 
  "modified_by": "Administrator", 
  "module": "Selling", 
  "name": "Quotation Item",