After being away on business, Tim thought it would be nice to bring his wife a little gift. "How about some perfume?" he asked the cosmetics clerk. She showed him a bottle costing $50.00.

"That's a bit much," said Tim, so she returned with a smaller bottle for $30.00. "That's still quite a bit," Tim complained.

Growing annoyed, the clerk brought out a tiny $15.00 bottle. "What I mean," said Tim, "is I'd like to see something really cheap."

The clerk handed him a mirror.