Error in denesting activity for the luggage trading items.

Question

Hello experts,
This has reference to the Denesting activity for the  luggage trading items in SAP. There has been an error in the basic configuration for this activity, as the denested stock is being incorrectly valued & consequently a wrong impact is being posted to the P&L. The actual landed cost for the nested item is not flowing to the denested items.
We have been correcting this manually till now through an FI JV. However we need to correct the system urgently as this has a serious implication & the impact is considerably high. E
Procedure for De-nesting:
The procedure for De-nesting is being carried out at BLL  location & at branches. Transaction code used for the same is MB1A. Two separate documents are prepared for de-nesting.
In MB1A, first document is being entered for Movement type 201 for depleting Nested item stock (Ref doc no 65489076) & subsequent document entered for movement type 202 for creating de-nested item stock (Ref doc no 6548769659).
The MAP for Nested Item is correctly being updated with each receipt through Mov Type 101. However the MAP for denested item codes is not being updated since the stock creation is through mov type 202. The Old MAP updated at the time of code creation remains stagnant. Thus the denested items are being valuated with an old MAP rate.
In normal condition, the value of both 201 & 202 should match.  As a result, the gap between the two kept on increasing & the inventory gets overvalued. The entries are posted to 8765987 (Consum-Intrnl-TMu2013 Dom) GL or 8765988 (Consum-Intrnl-TM-Imp) GL.
Reference Accounting doc no 3025689745 & 1589645896 for above referred material docs.
Please advice on this issue
Thanks,
Ratnam

Answer 1

Activating ML is necessary because in my customer's company sell goods at planed price then revaluate value of inventories and COGS at actual price in the end of each of period. So we decide to use standard price control for trading goods and active Material ledger.
end of period, we run period procedure of ML for trading goods, we expect allocation different amount, revaluate inventories and consumption. Run revaluation step of costing run in ML, we revaluate all   ending inventories and consumption transaction except billing transaction. So, we think that we need to run Ke27 to revaluate all line item document in COPA from billing.
so anybody to help me revaluate consumption amount from billing at actual price in end of period?
thanks in advance!