Why is the amount of the mb51 standard currency different from that of the historical standard currency of the purchase order?

Why does the value in the field "amount in local currency" in a material
Document, sometimes differ from the valued displayed for this material
Document in the purchase order history.
Answer:
These two fields relate to different fi postings. The field in
Material document (MSEG-DMBTR) is filled with the value that was
Posted to the stock account. The field in the purchase order history
(EKBE-DMBTR) displays the value that was posted to the gr/IR account
During the goods receept. There can be several reasons why the stock
Posting value differs from the value posted to the gr/IR account.
Example, when the material in question uses s-price control and
Price in the purchase order does not equal the standard price of
Material.

Translation

Why is the base currency amount of the material credential sometimes different from the base currency amount of the material recorded in the purchase order history?

Answer:

Two fields correspond to the fi storage location. The field (MSEG-DMBER) of the material creden。 is the amount of the inventory account. The purchase order history (EKBE-DMBTR) is the gr/IR account amount displayed upon receipt. There are many causes for inconsistency between the inventory account amount and the gr/IR account amount. For example, when the material uses s for price control, the price of the purchase order is not equal to the standard price.

 

If S is used for price control, the shipping is based on the standard price value as the warehouse receiving amount, and the price of the purchase order is ignored, in this way, the amount of the mb51 standard currency is different from that of the historical standard currency of the purchase order.