Wisdom Teeth

One day, a man walks into a dentist's office
and asks how much it will cost to extract wisdom teeth.

"Eighty dollars," the dentist says.

"That's a ridiculous amount," the man says.
"Isn't there a cheaper way?"

"Well," the dentist says,
"if you don't use an anaesthetic, I can knock it down to $60."

"That's still too expensive," the man says.

"Okay," says the dentist.
"If I save on anesthesia
and simply rip the teeth out with a pair of pliers,
I could get away with charging $20."

"Nope," moans the man, "it's still too much."

"Hm," says the dentist, scratching his head.
"If I let one of my students do it for the experience,
I suppose I could charge you just $10."

"Marvelous," says the man,
   "book my wife for next Tuesday!"