When I send an invoice to a customer I have no idea if they will pay by CC, EFT, e transfer or cheque. Now that businesses can add a credit card fee to a customer, I can't just add that to every invoice. It depends on their payment method. I would like it if a customer chooses to pay using sage/stripe, that we could then have the option of an added fee being added to the payment transaction automatically. I do not want to have to send a second invoice for the added CC fee.