A blonde walked into a department store

A blonde walked into a department store and said “i would like to buy this tv”.
the manager said “sorry we don’t sell to blondes”.
the blonde was so mad, she went home and died her hair black.
she went back to the department store and said “i would like to buy this tv please”, the manager said “sorry we don’t sell to blondes”.
the blonde was furious.
she went home and died her hair red but waited a couple of days to return.
after a couple of days she returned to the department store and said “i would like to buy this tv please”.
the manager replied with “we don’t sell to blondes”.
the blonde said how do you know I’m a blonde.
the manager said “because that’s a microwave