diff --git a/erpnext/manufacturing/doctype/bom/bom.js b/erpnext/manufacturing/doctype/bom/bom.js
index 2615b31..7b5339b 100644
--- a/erpnext/manufacturing/doctype/bom/bom.js
+++ b/erpnext/manufacturing/doctype/bom/bom.js
@@ -121,9 +121,11 @@
 			freeze: true,
 			args: {
 				update_parent: true,
-				from_child_bom:false
+				from_child_bom:false,
+				save: false
 			},
 			callback: function(r) {
+				refresh_field("items");
 				if(!r.exc) frm.refresh_fields();
 			}
 		});
diff --git a/erpnext/manufacturing/doctype/bom/bom.py b/erpnext/manufacturing/doctype/bom/bom.py
index 54ffa06..57a1cc25 100644
--- a/erpnext/manufacturing/doctype/bom/bom.py
+++ b/erpnext/manufacturing/doctype/bom/bom.py
@@ -8,6 +8,7 @@
 from erpnext.setup.utils import get_exchange_rate
 from frappe.website.website_generator import WebsiteGenerator
 from erpnext.stock.get_item_details import get_conversion_factor
+from erpnext.stock.get_item_details import get_price_list_rate
 
 import functools
 
@@ -109,7 +110,11 @@
 				"item_name": item.item_name,
 				"bom_no": item.bom_no,
 				"stock_qty": item.stock_qty,
-				"include_item_in_manufacturing": item.include_item_in_manufacturing
+				"include_item_in_manufacturing": item.include_item_in_manufacturing,
+				"qty": item.qty,
+				"uom": item.uom,
+				"stock_uom": item.stock_uom,
+				"conversion_factor": item.conversion_factor
 			})
 			for r in ret:
 				if not item.get(r):
@@ -141,7 +146,7 @@
 			 'uom'			: item and args['stock_uom'] or '',
  			 'conversion_factor': 1,
 			 'bom_no'		: args['bom_no'],
-			 'rate'			: rate / self.conversion_rate if self.conversion_rate else rate,
+			 'rate'			: rate,
 			 'qty'			: args.get("qty") or args.get("stock_qty") or 1,
 			 'stock_qty'	: args.get("qty") or args.get("stock_qty") or 1,
 			 'base_rate'	: rate,
@@ -173,35 +178,56 @@
 				elif self.rm_cost_as_per == "Price List":
 					if not self.buying_price_list:
 						frappe.throw(_("Please select Price List"))
-					rate = frappe.db.get_value("Item Price", {"price_list": self.buying_price_list,
-						"item_code": arg["item_code"]}, "price_list_rate") or 0.0
-
-					price_list_currency = frappe.db.get_value("Price List",
-						self.buying_price_list, "currency")
-					if price_list_currency != self.company_currency():
-						rate = flt(rate * self.conversion_rate)
+					args = frappe._dict({
+						"doctype": "BOM",
+						"price_list": self.buying_price_list,
+						"qty": arg.get("qty"),
+						"uom": arg.get("uom") or arg.get("stock_uom"),
+						"stock_uom": arg.get("stock_uom"),
+						"transaction_type": "buying",
+						"company": self.company,
+						"currency": self.currency,
+						"conversion_rate": self.conversion_rate or 1,
+						"conversion_factor": arg.get("conversion_factor") or 1,
+						"plc_conversion_rate": 1
+					})
+					item_doc = frappe.get_doc("Item", arg.get("item_code"))
+					out = frappe._dict()
+					get_price_list_rate(args, item_doc, out)
+					rate = out.price_list_rate
 
 				if not rate:
-					frappe.msgprint(_("{0} not found for Item {1}")
-						.format(self.rm_cost_as_per, arg["item_code"]), alert=True)
+					if self.rm_cost_as_per == "Price List":
+						frappe.msgprint(_("Price not found for item {0} and price list {1}")
+							.format(arg["item_code"], self.buying_price_list), alert=True)
+					else:
+						frappe.msgprint(_("{0} not found for item {1}")
+							.format(self.rm_cost_as_per, arg["item_code"]), alert=True)
 
 		return flt(rate)
 
-	def update_cost(self, update_parent=True, from_child_bom=False):
+	def update_cost(self, update_parent=True, from_child_bom=False, save=True):
 		if self.docstatus == 2:
 			return
 
 		existing_bom_cost = self.total_cost
 
 		for d in self.get("items"):
-			rate = self.get_rm_rate({"item_code": d.item_code, "bom_no": d.bom_no})
-			if rate:
-				d.rate = rate * flt(d.conversion_factor) / flt(self.conversion_rate)
+			d.rate = self.get_rm_rate({
+				"item_code": d.item_code,
+				"bom_no": d.bom_no,
+				"qty": d.qty,
+				"uom": d.uom,
+				"stock_uom": d.stock_uom,
+				"conversion_factor": d.conversion_factor
+			})
+			d.amount = flt(d.rate) * flt(d.qty)
 
 		if self.docstatus == 1:
 			self.flags.ignore_validate_update_after_submit = True
 			self.calculate_cost()
-		self.save()
+		if save:
+			self.save()
 		self.update_exploded_items()
 
 		# update parent BOMs
diff --git a/erpnext/manufacturing/doctype/bom_item/bom_item.json b/erpnext/manufacturing/doctype/bom_item/bom_item.json
index 8d4d69b..754540e 100644
--- a/erpnext/manufacturing/doctype/bom_item/bom_item.json
+++ b/erpnext/manufacturing/doctype/bom_item/bom_item.json
@@ -1023,6 +1023,71 @@
    "set_only_once": 0,
    "translatable": 0,
    "unique": 0
+  },
+  {
+   "allow_bulk_edit": 0,
+   "allow_in_quick_entry": 0,
+   "allow_on_submit": 0,
+   "bold": 0,
+   "collapsible": 0,
+   "columns": 0,
+   "fieldname": "operation",
+   "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": "Item operation",
+   "length": 0,
+   "no_copy": 0,
+   "options": "Operation",
+   "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,
+   "translatable": 0,
+   "unique": 0
+  },
+  {
+   "allow_bulk_edit": 0,
+   "allow_in_quick_entry": 0,
+   "allow_on_submit": 0,
+   "bold": 0,
+   "collapsible": 0,
+   "columns": 0,
+   "fieldname": "allow_alternative_item",
+   "fieldtype": "Check",
+   "hidden": 1,
+   "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 Alternative Item",
+   "length": 0,
+   "no_copy": 0,
+   "permlevel": 0,
+   "precision": "",
+   "print_hide": 0,
+   "print_hide_if_no_value": 0,
+   "read_only": 1,
+   "remember_last_selected_value": 0,
+   "report_hide": 0,
+   "reqd": 0,
+   "search_index": 0,
+   "set_only_once": 0,
+   "translatable": 0,
+   "unique": 0
   }
  ],
  "has_web_view": 0,
@@ -1035,7 +1100,7 @@
  "issingle": 0,
  "istable": 1,
  "max_attachments": 0,
- "modified": "2018-12-28 16:38:56.529079",
+ "modified": "2018-11-23 15:05:55.187136",
  "modified_by": "Administrator",
  "module": "Manufacturing",
  "name": "BOM Item",
diff --git a/erpnext/public/js/controllers/transaction.js b/erpnext/public/js/controllers/transaction.js
index 9dd9beb..4ef8b2e 100644
--- a/erpnext/public/js/controllers/transaction.js
+++ b/erpnext/public/js/controllers/transaction.js
@@ -441,6 +441,7 @@
 							weight_per_unit: item.weight_per_unit,
 							weight_uom: item.weight_uom,
 							uom : item.uom,
+							stock_uom: item.stock_uom,
 							pos_profile: me.frm.doc.doctype == 'Sales Invoice' ? me.frm.doc.pos_profile : '',
 							cost_center: item.cost_center
 						}
diff --git a/erpnext/regional/report/gstr_1/gstr_1.py b/erpnext/regional/report/gstr_1/gstr_1.py
index fa2d2af..0c7d066 100644
--- a/erpnext/regional/report/gstr_1/gstr_1.py
+++ b/erpnext/regional/report/gstr_1/gstr_1.py
@@ -120,7 +120,7 @@
 				and customer in ('{0}')""".format("', '".join([frappe.db.escape(c.name) for c in customers]))
 
 		if self.filters.get("type_of_business") in ("B2C Large", "B2C Small"):
-			b2c_limit = frappe.db.get_single_value('GSt Settings', 'b2c_limit')
+			b2c_limit = frappe.db.get_single_value('GST Settings', 'b2c_limit')
 			if not b2c_limit:
 				frappe.throw(_("Please set B2C Limit in GST Settings."))
 
@@ -201,7 +201,7 @@
 		if unidentified_gst_accounts:
 			frappe.msgprint(_("Following accounts might be selected in GST Settings:")
 				+ "<br>" + "<br>".join(unidentified_gst_accounts), alert=True)
-		
+
 		# Build itemised tax for export invoices where tax table is blank
 		for invoice, items in iteritems(self.invoice_items):
 			if invoice not in self.items_based_on_tax_rate \
diff --git a/erpnext/stock/get_item_details.py b/erpnext/stock/get_item_details.py
index bbea904..9db04cd 100644
--- a/erpnext/stock/get_item_details.py
+++ b/erpnext/stock/get_item_details.py
@@ -370,6 +370,8 @@
 	meta = frappe.get_meta(args.parenttype or args.doctype)
 
 	if meta.get_field("currency") or args.get('currency'):
+		pl_details = get_price_list_currency_and_exchange_rate(args)
+		args.update(pl_details)
 		validate_price_list(args)
 		if meta.get_field("currency") and args.price_list:
 			validate_conversion_rate(args, meta)
@@ -554,9 +556,10 @@
 		validate_conversion_rate(args.price_list_currency, args.plc_conversion_rate,
 			meta.get_label("plc_conversion_rate"), args.company)
 
-		args.plc_conversion_rate = flt(args.plc_conversion_rate,
-			get_field_precision(meta.get_field("plc_conversion_rate"),
-			frappe._dict({"fields": args})))
+		if meta.get_field("plc_conversion_rate"):
+			args.plc_conversion_rate = flt(args.plc_conversion_rate,
+				get_field_precision(meta.get_field("plc_conversion_rate"),
+				frappe._dict({"fields": args})))
 
 def get_party_item_code(args, item_doc, out):
 	if args.transaction_type=="selling" and args.customer:
@@ -792,7 +795,7 @@
 		if not result:
 			throw(_("Price List {0} is disabled or does not exist").format(price_list))
 
-		return result.price_not_uom_dependant
+		return not result.price_not_uom_dependant
 
 
 def get_price_list_currency_and_exchange_rate(args):