One time PO

Hi there,

  We are using PeopleSoft 9.1. I am trying to create a PO to use for only one transaction and pay the transaction with a receipt. Scenario: I need to create a PO for a $100 but the item for the PO is not exactly $100, sometimes it is $105 and sometimes it is $95.  When I create a receipt for $95.00 the PO should automatically close (with the remaining $5 on the PO) once a voucher is created and paid. I appreciate any suggestions.

Thank you,

Dante