blonde goes shopping

A blonde goes shopping and enters a shop selling electronic items . She goes to a salesman and says "  I want to buy this TV . "

The salesman says that he does not serve blondes . Irritated blonde goes back home and dyes her hair black .

Next day again she goes to the same shop and says " I want to buy this TV . " The salesman replies that he does not serve blondes .

Irritated blonde goes home and dyes her hair red.Next day she comes back to the same shop and asks another salesman that she wants to buy that TV . The salesman replies that he does not serve blondes . Irritated blonde replies " How come you know that I am a blonde . "

The salesman replies " It’s not a TV , it’s a microwave . "