Replacement Windows

Last year I replaced all the windows in my house with that expensive
double-pane energy efficient kind, and today, I got a call from the
contractor who had installed them.

He was complaining that the work had been completed a whole year ago
and I still hadn't paid for them.

Hellloooo,............just because
I'm blonde doesn't mean that I am automatically stupid.
 
So,  I told him just what his fast talking sales guy had told me last
year,  "that in ONE YEAR these windows would pay for themselves!
Helllooooo?  It's been a year!", I told him. 

There was only silence
at the other end of the line, so I finally just hung up. He never
called back. I bet he felt like an idiot.