diff --git a/erpnext/accounts/doctype/pricing_rule/test_pricing_rule.py b/erpnext/accounts/doctype/pricing_rule/test_pricing_rule.py
index f28cee7..ef9aad5 100644
--- a/erpnext/accounts/doctype/pricing_rule/test_pricing_rule.py
+++ b/erpnext/accounts/doctype/pricing_rule/test_pricing_rule.py
@@ -328,6 +328,21 @@
 		self.assertEquals(item.discount_amount, 110)
 		self.assertEquals(item.rate, 990)
 
+	def test_pricing_rule_with_margin_and_discount_amount(self):
+		frappe.delete_doc_if_exists('Pricing Rule', '_Test Pricing Rule')
+		make_pricing_rule(selling=1, margin_type="Percentage", margin_rate_or_amount=10,
+			rate_or_discount="Discount Amount", discount_amount=110)
+		si = create_sales_invoice(do_not_save=True)
+		si.items[0].price_list_rate = 1000
+		si.payment_schedule = []
+		si.insert(ignore_permissions=True)
+
+		item = si.items[0]
+		self.assertEquals(item.margin_rate_or_amount, 10)
+		self.assertEquals(item.rate_with_margin, 1100)
+		self.assertEquals(item.discount_amount, 110)
+		self.assertEquals(item.rate, 990)
+
 	def test_pricing_rule_for_product_discount_on_same_item(self):
 		frappe.delete_doc_if_exists('Pricing Rule', '_Test Pricing Rule')
 		test_record = {
@@ -560,6 +575,7 @@
 		"margin_rate_or_amount": args.margin_rate_or_amount or 0.0,
 		"condition": args.condition or '',
 		"priority": 1,
+		"discount_amount": args.discount_amount or 0.0,
 		"apply_multiple_pricing_rules": args.apply_multiple_pricing_rules or 0
 	})
 
diff --git a/erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py b/erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py
index 7cd1828..979231a 100644
--- a/erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py
+++ b/erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py
@@ -1166,10 +1166,12 @@
 
 	def test_create_so_with_margin(self):
 		si = create_sales_invoice(item_code="_Test Item", qty=1, do_not_submit=True)
-		price_list_rate = 100
+		price_list_rate = flt(100) * flt(si.plc_conversion_rate)
 		si.items[0].price_list_rate = price_list_rate
 		si.items[0].margin_type = 'Percentage'
 		si.items[0].margin_rate_or_amount = 25
+		si.items[0].discount_amount = 0.0
+		si.items[0].discount_percentage = 0.0
 		si.save()
 		self.assertEqual(si.get("items")[0].rate, flt((price_list_rate*25)/100 + price_list_rate))
 
diff --git a/erpnext/controllers/stock_controller.py b/erpnext/controllers/stock_controller.py
index cb44b73..f92e884 100644
--- a/erpnext/controllers/stock_controller.py
+++ b/erpnext/controllers/stock_controller.py
@@ -405,7 +405,7 @@
 	def set_rate_of_stock_uom(self):
 		if self.doctype in ["Purchase Receipt", "Purchase Invoice", "Purchase Order", "Sales Invoice", "Sales Order", "Delivery Note", "Quotation"]:
 			for d in self.get("items"):
-				d.stock_uom_rate = d.rate / d.conversion_factor
+				d.stock_uom_rate = d.rate / (d.conversion_factor or 1)
 
 	def validate_internal_transfer(self):
 		if self.doctype in ('Sales Invoice', 'Delivery Note', 'Purchase Invoice', 'Purchase Receipt') \
diff --git a/erpnext/controllers/taxes_and_totals.py b/erpnext/controllers/taxes_and_totals.py
index 220c876..f976b17 100644
--- a/erpnext/controllers/taxes_and_totals.py
+++ b/erpnext/controllers/taxes_and_totals.py
@@ -111,10 +111,12 @@
 					item.rate_with_margin, item.base_rate_with_margin = self.calculate_margin(item)
 					if flt(item.rate_with_margin) > 0:
 						item.rate = flt(item.rate_with_margin * (1.0 - (item.discount_percentage / 100.0)), item.precision("rate"))
-						if not item.discount_amount:
+
+						if item.discount_amount and not item.discount_percentage:
+							item.rate = item.rate_with_margin - item.discount_amount
+						else:
 							item.discount_amount = item.rate_with_margin - item.rate
-						elif not item.discount_percentage:
-							item.rate -= item.discount_amount
+
 					elif flt(item.price_list_rate) > 0:
 						item.discount_amount = item.price_list_rate - item.rate
 				elif flt(item.price_list_rate) > 0 and not item.discount_amount:
diff --git a/erpnext/patches/v13_0/item_reposting_for_incorrect_sl_and_gl.py b/erpnext/patches/v13_0/item_reposting_for_incorrect_sl_and_gl.py
index d968e1f..021bb72 100644
--- a/erpnext/patches/v13_0/item_reposting_for_incorrect_sl_and_gl.py
+++ b/erpnext/patches/v13_0/item_reposting_for_incorrect_sl_and_gl.py
@@ -20,9 +20,11 @@
 	frappe.clear_cache()
 	frappe.flags.warehouse_account_map = {}
 
+	company_list = []
+
 	data = frappe.db.sql('''
 		SELECT
-			name, item_code, warehouse, voucher_type, voucher_no, posting_date, posting_time
+			name, item_code, warehouse, voucher_type, voucher_no, posting_date, posting_time, company
 		FROM
 			`tabStock Ledger Entry`
 		WHERE
@@ -36,6 +38,9 @@
 	total_sle = len(data)
 	i = 0
 	for d in data:
+		if d.company not in company_list:
+			company_list.append(d.company)
+
 		update_entries_after({
 			"item_code": d.item_code,
 			"warehouse": d.warehouse,
@@ -53,8 +58,10 @@
 
 	print("Reposting General Ledger Entries...")
 
-	for row in frappe.get_all('Company', filters= {'enable_perpetual_inventory': 1}):
-		update_gl_entries_after(posting_date, posting_time, company=row.name)
+	if data:
+		for row in frappe.get_all('Company', filters= {'enable_perpetual_inventory': 1}):
+			if row.name in company_list:
+				update_gl_entries_after(posting_date, posting_time, company=row.name)
 
 	frappe.db.auto_commit_on_many_writes = 0