Two functions exist to assign exact cost reversing automatically. This is referred to as exact cost reversing.

To preserve correct inventory valuation, you typically want to pick return items from inventory at the unit cost that they were purchased at, not at their current unit cost. The credit memo posting will also revert any item charges that were assigned to the posted document, so that the item's value entries are the same as before the item charge was assigned. In addition to the original posted purchase invoice, you can apply the purchase credit memo or purchase return order to other purchase documents, for example another posted purchase invoice because you are also returning items delivered with that invoice. In that case, you must edit the information on the purchase credit memo or purchase return order. Accordingly, you can partially return received items or demand partial reimbursement of received services. The change may relate to all the products on the original purchase invoice or only to some of the products. The purchase credit memo or purchase return order functions as your internal documentation of the credit memo process for accounting purposes or to control the shipping of the involved items. Typically, you create a purchase credit memo or purchase return order in reaction to a credit memo sent to you by a vendor. For more information, see Correct or Cancel Unpaid Purchase Invoices. You can also not correct or cancel purchase invoices that were posted with with receipts from more than one purchase order. These functions only work for unpaid invoices, and they do not support partial returns or cancellations.

If a posted purchase invoice has not yet been paid, then you can use the Correct or Cancel functions on the posted purchase invoice to automatically reverse the involved transactions.

Memo post credit