Doctor Calls Plumber

One day the Doctor noticed that his sink was stopped up, so he called the plumber. Twenty minutes later the plumber arrived, knocking on the door.

Said the doctor, my sink is stopped up, could you fix it please?

So the plumber went to his van, got out his electric snake, took off the goose neck under the sink, ran the electric through the clogged pipe, put the goose neck back on-turned the water back on and the drain worked like a new drain.
All of this took about 10 minutes. Said the doctor to the plumber, "How much do I owe you?"

Said the plumber " That will be $180.00

Said the doctor, "I'm a doctor and I can't make that kind of money."

Said the plumber "I couldn't make that kind of money when I was a doctor either"