This form shows the actual costs posted to the selected part calculation line.They are the costs of posted purchase invoices... These costs are posted at the time the purchase invoice is processed permanently.

On the receipt of to-order parts, provisional costs are posted (the purchase order price). They are displayed on the AC Part costs; Part receipt costs form. Once the purchase invoice has been posted, this provisional price is adjusted by the actual costs. This settlement is displayed on the Costs of to-order part purchase invoice form.

The Help topic Processes in Isah contains more information about the way in which the actual part costs are calculated in Isah.