How does Fusion handle the total AP invoice amount variance with PO?

Sometimes, in the actual business, there will be cases where the invoice and the PO amount are not completely consistent, usually the total invoice amount is less than the total PO amount. However, we have received all quantities of this PO and the total amount of the invoice is the final settlement. How do we enter this AP invoice and match it all with the receipt?

We hope:

1. The AP invoice can match all the received quantities;
2. This PO can complete the invoicing instead of counting the difference amount as the uninvoiced amount;
3. The invoice quantity and invoice unit price of this AP invoice should be consistent with PO, and variance should be regarded as a separate line.