fix: sales return for product bundle items

erpnext/stock/doctype/serial_and_batch_bundle/serial_and_batch_bundle.py

@@ -638,6 +638,17 @@ class SerialandBatchBundle(Document):
 		if not rate and self.voucher_detail_no and self.voucher_no:
 			rate = frappe.db.get_value(child_table, self.voucher_detail_no, valuation_field)
 
+		is_packed_item = False
+		if rate is None and child_table == "Delivery Note Item":
+			rate = frappe.db.get_value(
+				"Packed Item",
+				self.voucher_detail_no,
+				"incoming_rate",
+			)
+
+			if rate is not None:
+				is_packed_item = True
+
 		stock_queue = []
 		batches = []
 		if prev_sle and prev_sle.stock_queue:
@@ -659,6 +670,9 @@ class SerialandBatchBundle(Document):
 			elif (d.incoming_rate == rate) and not stock_queue and d.qty and d.stock_value_difference:
 				continue
 
+			if is_packed_item and d.incoming_rate:
+				rate = d.incoming_rate
+
 			d.incoming_rate = flt(rate)
 			if d.qty:
 				d.stock_value_difference = flt(d.qty) * d.incoming_rate