Invoice tolerances

Summary:

Is there a way to define the invoice total amount in max monetary unit (for example 50 EUR) rather than a varience of shipment schedule amount vs. PO amount percentage?

Content (required):

Our customer is looking to limit the variance by a % or fixed amount (whichever is lower), so for example for a PO of 1000 EUR and the total amount tolerance %6, they expect since 50 EUR is < 6% of 1.000 (60), the EUR tolerance amount to pick up. Is there a setup to allow that?

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