A window salesman phoned a beekeeper.
"Hello, Mr. Brown," said the sales rep. "I'm calling because our company replaced all the windows in your honey-house with our triple-glazed weather-tight windows over a year ago, and you still haven't sent us a single payment. I know bekeepers haven't much money, but we really need paid."
Mr. Brown replied, "But you said they'd pay for THEMSELVES in 12 months."
mvh Edward :-P