How do I force the Invoices to use the same Exchange Date their associated Purchasing Orders did?

Hello Oracle Community Support,

If I create a Purchasing Order with a Currency different from the functional one, it uses the Exchange Rate of the corresponding date. However, when I generate the invoice it goes with a different Exchange Date, and this generates a Exchange Rate Variance.

Is it possible to force the Invoice to use the same Exchange Date the Purchasing Order did? (This is so that the Exchange Rate Variance results in 0).

Thanks in advance,

Carlos.