Yesterday, I was working drive through, this lady was ordering. I asked her if her order was complete, instead of answering me, she drove off (BEFORE I GOT TO TELL HER THE TOTAL) and came to the first window.
I told her the total at the window and she disagreed. I verified the order, and I got it right, and told her that the total she thought it was as the total BEFORE tax, but, because of tax, the total went up a bit. She got mad, asked for the receipt and rips it from my hand. I bet she felt stupid after realizing I was right. But from that moment, I didn't want to do cash OR headset. It affected me for the rest of the day and it wasn't even 7am.