re: Card readers at the table w/o receipt first

Just went 2 weeks when this happened at Masons. It also had “extra tip”calculated there as well as “this is based off the taxable” amount. You don’t tip on tax. It’s not over complicating it to bring the paper bill with the reader and just leave it at the table or paper bill and then come back with the reader. Why bring the reader, then go back and get the bill? Or get a real system that can show you the bill at the same time you get the card reader presented to you.