fix: zero rm-cost for batch rm item in SCR (backport #34616) (#34623)

fix: zero rm-cost for batch rm item in SCR (#34616)

fix: `0` rm-cost for batch rm item in SCR
(cherry picked from commit 867d898304)

Co-authored-by: Sagar Sharma <sagarsharma.s312@gmail.com>

erpnext/controllers/subcontracting_controller.py

@@ -455,7 +455,7 @@ class SubcontractingController(StockController):
 					"allow_zero_valuation": 1,
 				}
 			)
-			rm_obj.rate = get_incoming_rate(args)
+			rm_obj.rate = bom_item.rate if self.backflush_based_on == "BOM" else get_incoming_rate(args)
 
 		if self.doctype == self.subcontract_data.order_doctype:
 			rm_obj.required_qty = qty