Don't Get Sick At Night

A doctor was awakened at home at four in the morning by a patient who wanted to know how much he charged for a house call.

"What time is it?" the doctor angrily asked. "This better be an emergency. House calls are $180!"

"How much for an office visit," the caller went on.

"Eighty dollars."

"Okay, Doc," said the late night caller. "I'll meet you at your office in fifteen minutes."