(A customer is in the produce section and selects a 10 lb. bag of potatoes. She’ll actually save money if she buys two 5 lb. bags of potatoes, due to a buy one, get one free deal.)

Me: “Ma’am, our 5 lb. bags of potatoes are buy one, get one free this week.”

(The customer looks back and forth between her 10 lb. and the two 5lb. bags. She is clearly confused.)

Customer: “I’m sorry, but my family would never eat that many potatoes!”

Related:
Some Things Just Don’t Add Up, Part 6
Some Things Just Don’t Add Up, Part 5
Some Things Just Don’t Add Up, Part 4
Some Things Just Don’t Add Up, Part 3
Some Things Just Don’t Add Up, Part 2
Some Things Just Don’t Add Up