There is a blonde, she wants to buy a microwave. So she goes in and askes the salesclerk, "How much for that microwave?"

The salesclerk replies, "We don't sell Microwaves to blondes."

So the next day she dyes her hair red, and goes in and asks the same question. The salesclerk answers, "we don't sell microwaves to blondes."

So the next day she dyes her hair brunette and goes and asks the same question. The salesclerk replies the same way.

The blonde asks how he knows she is a blonde. The clerk says, "That isn't a microwave it's a TV."