Sally walked in to the Dentist office to make an appointment. “How much do you charge to pull out a tooth?” She asked.” “It’s $130”, was the prompt reply. “$130!” gasped Sally, that’s ridiculous! There must be a way for you to go cheaper.” “Well,” said the Dentist thoughtfully, I suppose if we don’t numb it, we could knock off $30.” “Only $30?,” countered Sally, “that’s still $100, you’ve got to make it cheaper.” “Well,” said the Dentist after a long pause, “I suppose if we take it out with a wrench we could knock it down to $50.” “Perfect”, said Sally happily. “I would like to make an appointment for next Tuesday, for my husband Jack.”