R12: How to settle credit note and invoice where the amount is negative

Hi,

We often have the situation where the invoice for a supplier is credited with a credit note but the amount is always slightly different (for an unknown reason).

E.g. Invoice is 100.00 and credit note is 100.02.

Any suggestions what the easiest way would be to have those 2 AP documents paid and have the small difference registered on a revenue account?

Thanks!