"I'd like to give you an injection of cortisone into your knee, Mr Schwartz. I think it will help your arthritis."
"What will it cost me, Doctor?"
"Money shouldn't be a consideration in making this kind of a decision, Mr Schwartz. But I know you're not a rich man, so I'll charge you only half my usual fee."
"So, what will it cost me, Doctor?"
"How about $10, Mr Schwartz?"
"How long will it take you to give the injection, Doctor?"
"Less than a minute, Mr Schwartz."
"You mean, Doctor, you get $10 for less than a minute's work?"
"I'll tell you what, Mr Schwartz, if it will make you happier, I'll leave the needle in longer."