Material Ledger:Purchase invoice difference not any allocated.

Dear expert.

I already active Material Ledger.

Now the Customizing OBYC as below:

We do the following step.

1.Receive the Raw material. Account Voucher as below.

D: Stock   100 USD - 10 pcs

  Cr: GR/IR 100 USD

2.Goods issue to Production Order. the Account Voucher as below.

D: Material Consumption: 20 USD - 2pcs

   C: Stock 20 USD - 2pcs

3.Received the vendor invoice. the appear two account voucher.

3.1 Voucher 1.

D: GR/IR 100 USD.

D: PRD-account: 10 USD.    (90100000)

C: AP 110 USD

3.2 Voucher 2.

D:Stock 8 USD

C: PRY-account: 8 USD (90100000)

General: The (10USD Total difference - 8USD Stock difference) 2 USD Consumption difference need to allocated to consumption's costing.

4. We go to run the Material Ledger Program:CKMLCP. the 2 USD always still the account :90100000 .

At the end of month : the account :90100000 balance is 2USD.

Who expert will help to explain why the 2USD not to allocated to consumption?

Due to Raw material using the Price Determinate 2 + V (Moving Price)? Or others reason ??

Thanks..

Regards,Alex

2013/12/12