An idiot had the windows in his house replaced with new double-insulated energy efficient windows.

Twelve months later he got a call from the contractor, complaining that the work has been done for a year and he had yet to make the first payment.

The idiot replies, "now don't try to pull a fast one on me. The salesman who sold me those windows told me that in one year they would pay for themselves."

Received from PackyHumor.

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