There are a lot of fees we have to pay. Quickbook monthly fee, Intuit fees and credit card processing fees. I read your directions on how to add in a service fee but I don’t see how doing that is going to pay the credit card company their 3% fee?! 
This is how I see an invoice with the service fee. 
Invoice $100,

service cc fee 3%.
Total to client is $103.

Client pays $103 with cc - WE STILL HAVE TO PAY THE CC FEE of 3% of $103. 
Am I wrong? 
I don’t understand how the CC gets their 3% 

Thanks.