4.5 No Surcharges. You agree that you will not impose a surcharge or any other fee for accepting PayPal as a payment method. You may charge a handling fee in connection with the sale of goods or services, as long as the handling fee does not operate as a surcharge and is not higher than the handling fee you charge for non-PayPal transactions.
Right, I got it. So I just created a "handling_fee" custom field and made it what I think our average purchase amount is going to be. Odds are it will even out in the end.