diff --git a/erpnext/__init__.py b/erpnext/__init__.py
index 96ad60f..76123b1 100644
--- a/erpnext/__init__.py
+++ b/erpnext/__init__.py
@@ -5,7 +5,7 @@
 from erpnext.hooks import regional_overrides
 from frappe.utils import getdate
 
-__version__ = '10.0.18'
+__version__ = '10.0.19'
 
 def get_default_company(user=None):
 	'''Get default company for user'''
diff --git a/erpnext/accounts/doctype/pos_profile/pos_profile.json b/erpnext/accounts/doctype/pos_profile/pos_profile.json
index 2cb8e10..ed3de07 100644
--- a/erpnext/accounts/doctype/pos_profile/pos_profile.json
+++ b/erpnext/accounts/doctype/pos_profile/pos_profile.json
@@ -260,6 +260,36 @@
    "bold": 0, 
    "collapsible": 0, 
    "columns": 0, 
+   "fieldname": "allow_user_to_edit_discount", 
+   "fieldtype": "Check", 
+   "hidden": 0, 
+   "ignore_user_permissions": 0, 
+   "ignore_xss_filter": 0, 
+   "in_filter": 0, 
+   "in_global_search": 0, 
+   "in_list_view": 0, 
+   "in_standard_filter": 0, 
+   "label": "Allow user to edit Discount", 
+   "length": 0, 
+   "no_copy": 0, 
+   "permlevel": 0, 
+   "precision": "", 
+   "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
+   "read_only": 0, 
+   "remember_last_selected_value": 0, 
+   "report_hide": 0, 
+   "reqd": 0, 
+   "search_index": 0, 
+   "set_only_once": 0, 
+   "unique": 0
+  }, 
+  {
+   "allow_bulk_edit": 0, 
+   "allow_on_submit": 0, 
+   "bold": 0, 
+   "collapsible": 0, 
+   "columns": 0, 
    "fieldname": "allow_print_before_pay", 
    "fieldtype": "Check", 
    "hidden": 0, 
@@ -1476,7 +1506,7 @@
  "issingle": 0, 
  "istable": 0, 
  "max_attachments": 0, 
- "modified": "2018-01-03 17:30:45.198147", 
+ "modified": "2018-01-31 19:33:11.765731", 
  "modified_by": "Administrator", 
  "module": "Accounts", 
  "name": "POS Profile", 
diff --git a/erpnext/accounts/doctype/sales_invoice/sales_invoice.py b/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
index 2a0c553..ed2e3e4 100644
--- a/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
+++ b/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
@@ -249,7 +249,8 @@
 		if pos:
 			return {
 				"print_format": pos.get("print_format_for_online"),
-				"allow_edit_rate": pos.get("allow_user_to_edit_rate")
+				"allow_edit_rate": pos.get("allow_user_to_edit_rate"),
+				"allow_edit_discount": pos.get("allow_user_to_edit_discount")
 			}
 
 	def update_time_sheet(self, sales_invoice):
diff --git a/erpnext/accounts/report/item_wise_sales_register/item_wise_sales_register.py b/erpnext/accounts/report/item_wise_sales_register/item_wise_sales_register.py
index ab5251f..8917c9f 100644
--- a/erpnext/accounts/report/item_wise_sales_register/item_wise_sales_register.py
+++ b/erpnext/accounts/report/item_wise_sales_register/item_wise_sales_register.py
@@ -168,11 +168,11 @@
 
 	for d in item_list:
 		invoice_item_row.setdefault(d.parent, []).append(d)
-		item_row_map.setdefault(d.parent, {}).setdefault(d.item_code, []).append(d)
+		item_row_map.setdefault(d.parent, {}).setdefault(d.item_code or d.item_name, []).append(d)
 
 	conditions = ""
 	if doctype == "Purchase Invoice":
-		conditions = " and category in ('Total', 'Valuation and Total')"
+		conditions = " and category in ('Total', 'Valuation and Total') and base_tax_amount_after_discount_amount != 0"
 
 	tax_details = frappe.db.sql("""
 		select
diff --git a/erpnext/accounts/report/purchase_register/purchase_register.py b/erpnext/accounts/report/purchase_register/purchase_register.py
index 37848d5..610475a 100644
--- a/erpnext/accounts/report/purchase_register/purchase_register.py
+++ b/erpnext/accounts/report/purchase_register/purchase_register.py
@@ -172,6 +172,7 @@
 		else sum(base_tax_amount_after_discount_amount) * -1 end as tax_amount
 		from `tabPurchase Taxes and Charges`
 		where parent in (%s) and category in ('Total', 'Valuation and Total')
+			and base_tax_amount_after_discount_amount != 0
 		group by parent, account_head, add_deduct_tax
 	""" % ', '.join(['%s']*len(invoice_list)), tuple([inv.name for inv in invoice_list]), as_dict=1)
 
diff --git a/erpnext/buying/doctype/purchase_order/purchase_order.py b/erpnext/buying/doctype/purchase_order/purchase_order.py
index 8075ab3..b448988 100644
--- a/erpnext/buying/doctype/purchase_order/purchase_order.py
+++ b/erpnext/buying/doctype/purchase_order/purchase_order.py
@@ -68,12 +68,16 @@
 			},
 			"Supplier Quotation Item": {
 				"ref_dn_field": "supplier_quotation_item",
-				"compare_fields": [["rate", "="], ["project", "="], ["item_code", "="], 
+				"compare_fields": [["project", "="], ["item_code", "="], 
 					["uom", "="], ["conversion_factor", "="]],
 				"is_child_table": True
 			}
 		})
 
+
+		if cint(frappe.db.get_single_value('Buying Settings', 'maintain_same_rate')):
+			self.validate_rate_with_reference_doc([["Supplier Quotation", "supplier_quotation", "supplier_quotation_item"]])
+
 	def validate_supplier(self):
 		prevent_po = frappe.db.get_value("Supplier", self.supplier, 'prevent_pos')
 		if prevent_po:
diff --git a/erpnext/buying/doctype/supplier_quotation/supplier_quotation.py b/erpnext/buying/doctype/supplier_quotation/supplier_quotation.py
index c395d0c..b221a08 100644
--- a/erpnext/buying/doctype/supplier_quotation/supplier_quotation.py
+++ b/erpnext/buying/doctype/supplier_quotation/supplier_quotation.py
@@ -124,7 +124,8 @@
 				["name", "supplier_quotation_item"],
 				["parent", "supplier_quotation"],
 				["material_request", "material_request"],
-				["material_request_item", "material_request_item"]
+				["material_request_item", "material_request_item"],
+				["sales_order", "sales_order"]
 			],
 			"postprocess": update_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 b3a55b6..da78c12 100644
--- a/erpnext/buying/doctype/supplier_quotation_item/supplier_quotation_item.json
+++ b/erpnext/buying/doctype/supplier_quotation_item/supplier_quotation_item.json
@@ -1332,6 +1332,37 @@
    "bold": 0, 
    "collapsible": 0, 
    "columns": 0, 
+   "fieldname": "sales_order", 
+   "fieldtype": "Link", 
+   "hidden": 0, 
+   "ignore_user_permissions": 0, 
+   "ignore_xss_filter": 0, 
+   "in_filter": 0, 
+   "in_global_search": 0, 
+   "in_list_view": 0, 
+   "in_standard_filter": 0, 
+   "label": "Sales Order", 
+   "length": 0, 
+   "no_copy": 0, 
+   "options": "Sales Order", 
+   "permlevel": 0, 
+   "precision": "", 
+   "print_hide": 1, 
+   "print_hide_if_no_value": 0, 
+   "read_only": 1, 
+   "remember_last_selected_value": 0, 
+   "report_hide": 0, 
+   "reqd": 0, 
+   "search_index": 1, 
+   "set_only_once": 0, 
+   "unique": 0
+  }, 
+  {
+   "allow_bulk_edit": 0, 
+   "allow_on_submit": 0, 
+   "bold": 0, 
+   "collapsible": 0, 
+   "columns": 0, 
    "fieldname": "request_for_quotation", 
    "fieldtype": "Link", 
    "hidden": 0, 
@@ -1614,7 +1645,7 @@
  "issingle": 0, 
  "istable": 1, 
  "max_attachments": 0, 
- "modified": "2017-12-14 09:37:47.427897", 
+ "modified": "2018-01-25 15:04:40.171617", 
  "modified_by": "Administrator", 
  "module": "Buying", 
  "name": "Supplier Quotation Item", 
diff --git a/erpnext/config/projects.py b/erpnext/config/projects.py
index b97e097..ac11c7e 100644
--- a/erpnext/config/projects.py
+++ b/erpnext/config/projects.py
@@ -15,7 +15,7 @@
 				{
 					"type": "doctype",
 					"name": "Task",
-					"route": "Tree/Task",
+					"route": "List/Task",
 					"description": _("Project activity / task."),
 				},
 				{
diff --git a/erpnext/manufacturing/doctype/bom/bom.py b/erpnext/manufacturing/doctype/bom/bom.py
index fb52d52..2e69475 100644
--- a/erpnext/manufacturing/doctype/bom/bom.py
+++ b/erpnext/manufacturing/doctype/bom/bom.py
@@ -544,7 +544,7 @@
 				group by item_code, stock_uom
 				order by idx"""
 
-	if fetch_exploded:
+	if cint(fetch_exploded):
 		query = query.format(table="BOM Explosion Item",
 			where_conditions="",
 			select_columns = ", bom_item.source_warehouse, (Select idx from `tabBOM Item` where item_code = bom_item.item_code and parent = %(parent)s ) as idx")
diff --git a/erpnext/patches.txt b/erpnext/patches.txt
index f5953e2..a038ffd 100644
--- a/erpnext/patches.txt
+++ b/erpnext/patches.txt
@@ -491,3 +491,4 @@
 erpnext.patches.v10_0.added_extra_gst_custom_field
 erpnext.patches.v10_0.workflow_leave_application #2018-01-24
 erpnext.patches.v10_0.set_default_payment_terms_based_on_company
+erpnext.patches.v10_0.update_sales_order_link_to_purchase_order
diff --git a/erpnext/patches/v10_0/update_sales_order_link_to_purchase_order.py b/erpnext/patches/v10_0/update_sales_order_link_to_purchase_order.py
new file mode 100644
index 0000000..b4f5838
--- /dev/null
+++ b/erpnext/patches/v10_0/update_sales_order_link_to_purchase_order.py
@@ -0,0 +1,18 @@
+# License: GNU General Public License v3. See license.txt
+
+from __future__ import unicode_literals
+import frappe
+
+def execute():
+	frappe.reload_doc("buying", "doctype", "supplier_quotation_item")
+
+	for doctype in ['Purchase Order','Supplier Quotation']:
+		frappe.db.sql("""
+			Update
+				`tab{doctype} Item`, `tabMaterial Request Item`
+			set
+				`tab{doctype} Item`.sales_order = `tabMaterial Request Item`.sales_order
+			where
+				`tab{doctype} Item`.material_request= `tabMaterial Request Item`.parent
+				and `tab{doctype} Item`.material_request_item = `tabMaterial Request Item`.name
+				and `tabMaterial Request Item`.sales_order is not null""".format(doctype=doctype))
\ No newline at end of file
diff --git a/erpnext/selling/page/point_of_sale/point_of_sale.js b/erpnext/selling/page/point_of_sale/point_of_sale.js
index 2da5431..5c2662c 100644
--- a/erpnext/selling/page/point_of_sale/point_of_sale.js
+++ b/erpnext/selling/page/point_of_sale/point_of_sale.js
@@ -469,6 +469,7 @@
 					if (r.message) {
 						this.frm.meta.default_print_format = r.message.print_format || 'POS Invoice';
 						this.frm.allow_edit_rate = r.message.allow_edit_rate;
+						this.frm.allow_edit_discount = r.message.allow_edit_discount;
 					}
 				}
 
@@ -565,9 +566,9 @@
 						<div class="taxes-and-totals">
 							${this.get_taxes_and_totals()}
 						</div>
-						<div class="discount-amount">
-							${this.get_discount_amount()}
-						</div>
+						<div class="discount-amount">`+
+						(!this.frm.allow_edit_discount ? `` : `${this.get_discount_amount()}`)+
+						`</div>
 						<div class="grand-total">
 							${this.get_grand_total()}
 						</div>
@@ -596,6 +597,7 @@
 		this.numpad && this.numpad.reset_value();
 		this.customer_field.set_value("");
 
+		this.$discount_amount.find('input:text').val('');
 		this.wrapper.find('.grand-total-value').text(
 			format_currency(this.frm.doc.grand_total, this.frm.currency));
 		this.wrapper.find('.rounded-total-value').text(
@@ -726,6 +728,17 @@
 		this.customer_field.set_value(this.frm.doc.customer);
 	}
 
+	disable_numpad_control() {
+		let disabled_btns = [];
+		if(!this.frm.allow_edit_rate) {
+			disabled_btns.push('Rate');
+		}
+		if(!this.frm.allow_edit_discount) {
+			disabled_btns.push('Disc');
+		}
+		return disabled_btns;
+	}
+
 	make_numpad() {
 		this.numpad = new NumberPad({
 			button_array: [
@@ -740,7 +753,7 @@
 			disable_highlight: ['Qty', 'Disc', 'Rate', 'Pay'],
 			reset_btns: ['Qty', 'Disc', 'Rate', 'Pay'],
 			del_btn: 'Del',
-			disable_btns: !this.frm.allow_edit_rate ? ['Rate']: [],
+			disable_btns: this.disable_numpad_control(),
 			wrapper: this.wrapper.find('.number-pad-container'),
 			onclick: (btn_value) => {
 				// on click
@@ -1280,7 +1293,7 @@
 		this.disable_highlight = disable_highlight;
 		this.reset_btns = reset_btns;
 		this.del_btn = del_btn;
-		this.disable_btns = disable_btns;
+		this.disable_btns = disable_btns || [];
 		this.make_dom();
 		this.bind_events();
 		this.value = '';
@@ -1312,13 +1325,15 @@
 
 		this.set_class();
 
-		this.disable_btns.forEach((btn) => {
-			const $btn = this.get_btn(btn);
-			$btn.prop("disabled", true)
-			$btn.hover(() => {
-				$btn.css('cursor','not-allowed');
+		if(this.disable_btns) {
+			this.disable_btns.forEach((btn) => {
+				const $btn = this.get_btn(btn);
+				$btn.prop("disabled", true)
+				$btn.hover(() => {
+					$btn.css('cursor','not-allowed');
+				})
 			})
-		})
+		}
 	}
 
 	set_class() {
diff --git a/erpnext/setup/doctype/item_group/item_group.py b/erpnext/setup/doctype/item_group/item_group.py
index 39172d7..14a478d 100644
--- a/erpnext/setup/doctype/item_group/item_group.py
+++ b/erpnext/setup/doctype/item_group/item_group.py
@@ -9,6 +9,7 @@
 from frappe.website.website_generator import WebsiteGenerator
 from frappe.website.render import clear_cache
 from frappe.website.doctype.website_slideshow.website_slideshow import get_slideshow
+from erpnext.utilities.product import get_qty_in_stock
 
 
 class ItemGroup(NestedSet, WebsiteGenerator):
@@ -83,7 +84,8 @@
 	# base query
 	query = """select I.name, I.item_name, I.item_code, I.route, I.image, I.website_image, I.thumbnail, I.item_group,
 			I.description, I.web_long_description as website_description, I.is_stock_item,
-			case when (S.actual_qty - S.reserved_qty) > 0 then 1 else 0 end as in_stock
+			case when (S.actual_qty - S.reserved_qty) > 0 then 1 else 0 end as in_stock, I.website_warehouse,
+			I.has_batch_no
 		from `tabItem` I
 		left join tabBin S on I.item_code = S.item_code and I.website_warehouse = S.warehouse
 		where I.show_in_website = 1
@@ -104,8 +106,26 @@
 
 	data = frappe.db.sql(query, {"product_group": product_group,"search": search, "today": nowdate()}, as_dict=1)
 
+	data = adjust_qty_for_expired_items(data)
+
 	return [get_item_for_list_in_html(r) for r in data]
 
+
+def adjust_qty_for_expired_items(data):
+	adjusted_data = []
+
+	for item in data:
+		if item.get('has_batch_no') and item.get('website_warehouse'):
+			stock_qty_dict = get_qty_in_stock(
+				item.get('name'), 'website_warehouse', item.get('website_warehouse'))
+			qty = stock_qty_dict.stock_qty[0][0]
+			item['in_stock'] = 1 if qty else 0
+		adjusted_data.append(item)
+
+	return adjusted_data
+
+
+
 def get_child_groups(item_group_name):
 	item_group = frappe.get_doc("Item Group", item_group_name)
 	return frappe.db.sql("""select name
diff --git a/erpnext/stock/doctype/batch/batch.py b/erpnext/stock/doctype/batch/batch.py
index 1673a96..b5674d3 100644
--- a/erpnext/stock/doctype/batch/batch.py
+++ b/erpnext/stock/doctype/batch/batch.py
@@ -131,7 +131,7 @@
 	:param batch_no: Optional - give qty for this batch no
 	:param warehouse: Optional - give qty for this warehouse
 	:param item_code: Optional - give qty for this item"""
-	frappe.has_permission('Batch', throw=True)
+
 	out = 0
 	if batch_no and warehouse:
 		out = float(frappe.db.sql("""select sum(actual_qty)
diff --git a/erpnext/stock/doctype/material_request/material_request.py b/erpnext/stock/doctype/material_request/material_request.py
index da310aa..defce62 100644
--- a/erpnext/stock/doctype/material_request/material_request.py
+++ b/erpnext/stock/doctype/material_request/material_request.py
@@ -65,7 +65,7 @@
 			self.status = "Draft"
 
 		from erpnext.controllers.status_updater import validate_status
-		validate_status(self.status, 
+		validate_status(self.status,
 			["Draft", "Submitted", "Stopped", "Cancelled", "Pending",
 			"Partially Ordered", "Ordered", "Issued", "Transferred"])
 
@@ -240,7 +240,8 @@
 				["name", "material_request_item"],
 				["parent", "material_request"],
 				["uom", "stock_uom"],
-				["uom", "uom"]
+				["uom", "uom"],
+				["sales_order", "sales_order"]
 			],
 			"postprocess": update_item,
 			"condition": lambda doc: doc.ordered_qty < doc.stock_qty
@@ -344,7 +345,8 @@
 			"doctype": "Supplier Quotation Item",
 			"field_map": {
 				"name": "material_request_item",
-				"parent": "material_request"
+				"parent": "material_request",
+				"sales_order": "sales_order"
 			}
 		}
 	}, target_doc, postprocess)
diff --git a/erpnext/stock/get_item_details.py b/erpnext/stock/get_item_details.py
index a7638b4..6b67233 100644
--- a/erpnext/stock/get_item_details.py
+++ b/erpnext/stock/get_item_details.py
@@ -472,8 +472,8 @@
 @frappe.whitelist()
 def get_bin_details(item_code, warehouse):
 	return frappe.db.get_value("Bin", {"item_code": item_code, "warehouse": warehouse},
-			["projected_qty", "actual_qty"], as_dict=True) \
-			or {"projected_qty": 0, "actual_qty": 0}
+			["projected_qty", "actual_qty", "ordered_qty"], as_dict=True) \
+			or {"projected_qty": 0, "actual_qty": 0, "ordered_qty": 0}
 
 @frappe.whitelist()
 def get_serial_no_details(item_code, warehouse, stock_qty, serial_no):
diff --git a/erpnext/stock/report/stock_ledger/stock_ledger.py b/erpnext/stock/report/stock_ledger/stock_ledger.py
index 8377f59..e436132 100644
--- a/erpnext/stock/report/stock_ledger/stock_ledger.py
+++ b/erpnext/stock/report/stock_ledger/stock_ledger.py
@@ -106,11 +106,10 @@
 	from erpnext.stock.stock_ledger import get_previous_sle
 	last_entry = get_previous_sle({
 		"item_code": filters.item_code,
-		"warehouse": get_warehouse_condition(filters.warehouse),
+		"warehouse_condition": get_warehouse_condition(filters.warehouse),
 		"posting_date": filters.from_date,
 		"posting_time": "00:00:00"
 	})
-
 	row = [""]*len(columns)
 	row[1] = _("'Opening'")
 	for i, v in ((9, 'qty_after_transaction'), (11, 'valuation_rate'), (12, 'stock_value')):
@@ -122,7 +121,7 @@
 	warehouse_details = frappe.db.get_value("Warehouse", warehouse, ["lft", "rgt"], as_dict=1)
 	if warehouse_details:
 		return " exists (select name from `tabWarehouse` wh \
-			where wh.lft >= %s and wh.rgt <= %s and sle.warehouse = wh.name)"%(warehouse_details.lft,
+			where wh.lft >= %s and wh.rgt <= %s and warehouse = wh.name)"%(warehouse_details.lft,
 			warehouse_details.rgt)
 
 	return ''
diff --git a/erpnext/stock/stock_ledger.py b/erpnext/stock/stock_ledger.py
index b5a2d78..956f976 100644
--- a/erpnext/stock/stock_ledger.py
+++ b/erpnext/stock/stock_ledger.py
@@ -407,7 +407,12 @@
 
 def get_stock_ledger_entries(previous_sle, operator=None, order="desc", limit=None, for_update=False, debug=False):
 	"""get stock ledger entries filtered by specific posting datetime conditions"""
-	conditions = "timestamp(posting_date, posting_time) {0} timestamp(%(posting_date)s, %(posting_time)s)".format(operator)
+	conditions = " and timestamp(posting_date, posting_time) {0} timestamp(%(posting_date)s, %(posting_time)s)".format(operator)
+	if previous_sle.get("warehouse"):
+		conditions += " and warehouse = %(warehouse)s"
+	elif previous_sle.get("warehouse_condition"):
+		conditions += " and " + previous_sle.get("warehouse_condition")
+
 	if not previous_sle.get("posting_date"):
 		previous_sle["posting_date"] = "1900-01-01"
 	if not previous_sle.get("posting_time"):
@@ -418,9 +423,8 @@
 
 	return frappe.db.sql("""select *, timestamp(posting_date, posting_time) as "timestamp" from `tabStock Ledger Entry`
 		where item_code = %%(item_code)s
-		and warehouse = %%(warehouse)s
 		and ifnull(is_cancelled, 'No')='No'
-		and %(conditions)s
+		%(conditions)s
 		order by timestamp(posting_date, posting_time) %(order)s, name %(order)s
 		%(limit)s %(for_update)s""" % {
 			"conditions": conditions,
diff --git a/erpnext/utilities/product.py b/erpnext/utilities/product.py
index 9d5c056..415056d 100644
--- a/erpnext/utilities/product.py
+++ b/erpnext/utilities/product.py
@@ -4,25 +4,70 @@
 from __future__ import unicode_literals
 
 import frappe
-from frappe.utils import cint, fmt_money, flt
+from frappe.utils import cint, fmt_money, flt, nowdate, getdate
 from erpnext.accounts.doctype.pricing_rule.pricing_rule import get_pricing_rule_for_item
+from erpnext.stock.doctype.batch.batch import get_batch_qty
 
-def get_qty_in_stock(item_code, item_warehouse_field):
+def get_qty_in_stock(item_code, item_warehouse_field, warehouse=None):
 	in_stock, stock_qty = 0, ''
 	template_item_code, is_stock_item = frappe.db.get_value("Item", item_code, ["variant_of", "is_stock_item"])
 
-	warehouse = frappe.db.get_value("Item", item_code, item_warehouse_field)
+	if not warehouse:
+		warehouse = frappe.db.get_value("Item", item_code, item_warehouse_field)
+
 	if not warehouse and template_item_code and template_item_code != item_code:
 		warehouse = frappe.db.get_value("Item", template_item_code, item_warehouse_field)
 
 	if warehouse:
 		stock_qty = frappe.db.sql("""select GREATEST(actual_qty - reserved_qty, 0) from tabBin where
 			item_code=%s and warehouse=%s""", (item_code, warehouse))
-		if stock_qty:
+
+	if stock_qty:
+		stock_qty = adjust_qty_for_expired_items(item_code, stock_qty, warehouse)
+
+	if stock_qty:
+		in_stock = stock_qty[0][0] > 0 and 1 or 0
+
+	if stock_qty:
 			in_stock = stock_qty[0][0] > 0 and 1 or 0
 
 	return frappe._dict({"in_stock": in_stock, "stock_qty": stock_qty, "is_stock_item": is_stock_item})
 
+
+def adjust_qty_for_expired_items(item_code, stock_qty, warehouse):
+	batches = frappe.get_all('Batch', filters=[{'item': item_code}], fields=['expiry_date', 'name'])
+	expired_batches = get_expired_batches(batches)
+	stock_qty = [list(item) for item in stock_qty]
+	
+	for batch in expired_batches:
+		if warehouse:
+			stock_qty[0][0] = max(0, stock_qty[0][0] - get_batch_qty(batch, warehouse))
+		else:
+			stock_qty[0][0] = max(0, stock_qty[0][0] - qty_from_all_warehouses(get_batch_qty(batch)))
+
+		if not stock_qty[0][0]:
+			break
+
+	return stock_qty
+
+
+def get_expired_batches(batches):
+	"""
+	:param batches: A list of dict in the form [{'expiry_date': datetime.date(20XX, 1, 1), 'name': 'batch_id'}, ...]
+	"""
+	return [b.name for b in batches if b.expiry_date and b.expiry_date <= getdate(nowdate())]
+
+
+def qty_from_all_warehouses(batch_info):
+	"""
+	:param batch_info: A list of dict in the form [{u'warehouse': u'Stores - I', u'qty': 0.8}, ...]
+	"""
+	qty = 0
+	for batch in batch_info:
+		qty = qty + batch.qty
+
+	return qty
+
 def get_price(item_code, price_list, customer_group, company, qty=1):
 	template_item_code = frappe.db.get_value("Item", item_code, "variant_of")