Yes, To make it automatic we need to develop a script and script will apply credit card processing fee on cash sale.

@Netsuite Tragic, just tagging you on Kumar's reply in case you missed it

Yep, saw the reply. We are just looking at how it will work for this case. They have an existing end of day invoicing which needs to be updated.

You can feel free to ping me anytime I will be happy to assist you.