After being away on business, Tom 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 Tom, so she returned with a smaller bottle for $30.00.

"That's still quite a bit," Tom groused.

Growing annoyed, the clerk brought out a tiny $15.00 bottle.

"What I mean," said Tom, "is I'd like to see something really cheap."

So the clerk handed him a mirror.