Keep the Change（零钱不用找了）

        I was selling secondhand books at the flea market. I got into an argument(争吵) with a customer. He wanted to buy The Pocket Book of Harrypotter. But he said it was too expensive at 35 cents. Other paperbacks were selling for ten or 15 cents each.

        I pointed out(指出) that the book was selling good. Harrypotter was a good book and it wasn’t expensive at all. He said it was a matter of principle(原则问题). Finally, I agreed to sell him the book for 15 cents. Triumphant(得意洋洋), he paid with a $10 bill. "Keep the change," he said.