A lady goes into a grocery store to buy some tampon. As fate would have it she picked up a box without a price on it. When the cashier went to ring it up he noticed there was not a price.

As grocery cashiers are so inclined to do, he grabbed the P. A. microphone and said, "Need a price on TAMPAX!"

A stock boy who heard the garbled message thought the cashier said, "Some tacks" and promptly yelled back, "The kind you pound in with a hammer or the kind you push in with your finger?"

Source: Jokes