Scotsman thrift

A Scotsman asks the dentist the cost for a tooth extraction.
"£85 for an extraction sir," was the dentist's reply.

"£85? Huv ye no' got anythin' cheaper?"
"That's the normal charge," said the dentist.

"Whit aboot if ye didnae use any anesthetic?"
"That's unusual, sir, but I could do it and knock £15 off."

Whit aboot if ye used wan o yer dentist trainees and still withoot the anesthetic?"
"I can't guarantee their professionalism and it'll be painful. But the price could drop to £40."

"How aboot if ye make it a trainin' session, 'ave yer student do the extraction wae' the other students watchin' and learnin?"
"It'll be good for the students," mulled the dentist. "OK, I'll charge you £5. But it will be traumatic."

"Och, now yer talkin' laddie! It's a deal," said the Scotsman.
"Can ye confirm an appointment for the wife next Tuesday then?"