Dealing with Cash Discount and Exchange Rate Differences 
The cash discount paid, cash discount received or lost cash discount due during payment is updated online in Funds Management in a separate commitment item and displayed in the information system accordingly.
You can use program P&L Adjustment (SAPF181 ) to subsequently distribute cash discount paid, classified by cause, to the individual funds centers and commitment items. The distributed cash discount paid is then displayed under "Profit transfer postings" in the information system ( value type 66).
If you do not want a distribution when executing the program SAPF181 within the framework of Account assignment objects not to be taken into account (COBL) , enter FIPOS.
To update the cash discount paid, cash discount received or lost cash discount due to a separate commitment item, the following prerequisites must be met:
You must have created a commitment item for cash discount paid and cash discount received (each with financial transaction 30, and item category 2 for the revenue item and 3 for the expenditure item). For further information on maintaining commitment items, see Maintaining Commitment Items
A default funds center must be assigned to these commitment items.
The cash discount received and cash discount paid accounts must be assigned to the commitment items. For more information, see Deriving the Commitment Item from the G/L Account and Account Assignment Derivation .

Availability control must not give rise to any errors during posting. Therefore you should flag the commitment items as statistical. For further information on statistical postings, see Statistical Postings .
To distribute cash discount amounts and exchange rate differences choose Accounting → Financial Accounting → General Ledger → Periodic Processing → Closing → Regroup → Profit and Loss Adjustment .

In the case of net postings, only the net amounts are charged against the budget. If you have not included the discount line in the posting, you can use SAPF181 later to distribute the discount amounts to the individual funds centers and commitment items.