With Mercury raising their rates, again, I need a box that can be check to include a surcharge to invoices paid with a credit card. To expect the counter sales person to add it in at the counter at the time of payment collection is like paying yourself a Christmas bonus out of your own wallet, it ain't going to happen. Part of the reason I've been looking to get better rates from my bank. I know most of the cost's are fixed and can't be changed. It's killing my profits on credit card purchases. Since a lot of my charges are small tickets. And when it's over a thousand, when you add up all the fees it's right at 10%. That usually means a loss on the sale.