Pie charts are nice for gas vs taxes, just so the customer knows where the money is going. But it's a totally different situation when one of the fees (a cc su

Pie charts are nice for gas vs taxes, just so the customer knows where the money is going. But it's a totally different situation when one of the fees (a cc surcharge) only applies if the customer chooses a certain payment method. That has to be explicitly flagged somewhere in the transaction flow. You can't expect people to do the math and realize that the total is 12% more than the subtotal, not 9% more.