Does anyone know of a way to apply a handling charge on top of FedEx shipping fees that come from the FedEx API? Is there a way to add a markup to the amount calculated by FedEx?
For example, if the FedEx API returns FEDEX GROUND at $5.00 and FEDEX PRIORITY OVERNIGHT at $10.00, I'd like the prices to be marked up by 40% so the customer would see $7 and $14.
Thank you