The Periodic Costing value for RCT-PO, ISS-PRV, and RCT-LA is based on the invoice value and the tax value is obtained from Accounts Payable. The system includes non-recoverable taxes in the value of the receipt. When the invoice is not matched, the system uses the PO cost. When you set the Use Supplier invoices field in the Periodic Costing Control (30.5.24), the system uses only supplier invoice cost. When the invoice does not exist, then the cost of the receipt is 0 (zero).

There is a variation on calculation of negative RCT-PO and ISS-PRV for the WAVG and FIFO methods. In the WAVG method, the system still considers both negative RCT-PO and ISS-PRV as receipts, and they affect the unit cost calculation. In the FIFO method, the system considers it as an issue, and it does not affect the unit cost calculation. The cost for that transaction is based on the cost calculation period cost of the item from where it is picked.