D1 Cost-Outside Operation Loaded to WO

Hello,

I do have a query of D1 cost accounted through Manufacturing Accounting R31802A. I have a below scenario where i need a help.

I have done the cost rollup for FG item and D1 cost gets updated as 10 for FG Item (Outside Operation Std Cost defined for *OP item is 10 in P4105).

Now i have created a Work Order of Qty 10. After done with the Order Processing my PO gets created automatically with Unit cost as 10.

I have a scenario where different supplier process the same operation at different cost. So during receiving the above PO (With Qty=10) i have changed the Unit Cost from 10 to 12.