how to handle unplanned freight cost

Scenario: successful our system, idiosyncratic created PR, PR spell done the support flow, aft PR released, PR volition beryllium converted to PO, supplier delivered products and sent the invoice which included the freight cost, this freight outgo was not included successful PO. Question: however bash we grip the unplanned freight cost? we don't privation to PO spell done the support travel again, and dilatory down the invoice posting?