This story was posted on rec.humor.funny. I assume it is true. I thought the readers of this list would find it interesting.
email@example.com (Doug Salomon) _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ I was behind a little girl at a checkout stand. She held two boxes of dog food priced at $0.99 and had two dollar bills to pay for them with. When the cashier explained that with tax it would come to $2.16, the girl hesitated, thought about it, then said "I'll just buy one."
She opened the newly purchased box, took out a 20 cents off coupon and bought the second box.