As you reached for your card, you tried to estimate the bill. Your crop was $19.99, so the total would probably be around ...
"$347.53, after tax." Mistress Liza dropped that total with as little emotion as if she was reading the weather report. You were stunned, but she snatched the card out of your hand and swiped it, and stuck it back between your still-frozen finger and thumb. "Don't worry," she said, "your Goddess will love it."
Without the slightest hint of a smile, she handed you the bag and you staggered out the door - still dazed and confused.