The difference between the purchase order price total and the cumulative invoice price total for the invoice line, in the ...

The difference between the purchase order price total and the cumulative invoice price total for the invoice line, in the currency of the transaction. Typically, the unmatched purchase price total includes the invoice line that you are working with plus any posted and on-hold invoices for the same purchase order line. This field is not displayed if None is selected in the Match price totals field in the Accounts payable parameters page.