Sometimes it’s like this…
So a guy calls up a mechanic, because his car is acting all funny, running like crap, belching blue smoke, the works.
The mechanic looks at the car for a few seconds, rummages around in his tool box, pulls out a nut and a washer, crawls under the car with a spanner, and comes out a minute later without the nut and washer.
Then he leans in and starts the car, which runs perfectly.
Then he goes into his office and returns with a bill for £500. The customer goes nuts, screams rants yells, “You just put on ONE nut! And you’re going to charge me £500 for ONE NUT?”
The mechanic shrugs, goes back into his office, and returns with a new bill.
It reads:
Nut: 50 pence
Knowing where to put the nut: £499.50
Total: £500.00