A place for FHs to enter credit card fee when recording the payment, not on the contract.

I understand based on a note on a previous idea that there are legal reasons to us having a credit card fee calculator, but it would be very helpful to our FHs if there was a way to record credit card fees in Passare for receipts and documentation's sake. Currently that has to be added to the contract but families do not know when the contract is written and signed what all will or will not be put on a credit card so it is very inconvenient for our Funeral Homes. Even if there is also a calculator icon so the FD can calculate this fee themselves or something, then record it that would be a lot more helpful.