I create a seles order and delivery,in that time the MAP 100 USD. so the cost is 100 in PGI.
Then the customer want to return part of the goods back,we create returns order and returns delivery, but now the cost of item changed and down to 90 USD, so the cost is 90 in PGI. I need to keep the cost 100 USD.
Is there any solution to deal this issue?