Can you add a certain percentage to services
Our store offers different shipping services for our local community. One that has been requested is USPS services. The problem we have, is that none of the USPS software auto inflates the price (as UPS and FedEx do) and the response is always, just add it.
So, my question is: Is there a way to automatically add, say 20% to a package we are shipping out, to help cover our costs?