This is classic: http://failblog.org/2009/02/04/verizon-math-fail/.
For those who don’t want to click the link (but you really should), it is an audio recording of a guy on the phone to Verizon. Apparently, he was supposed to be charged .002 cents per Kb of data use. He used 35896 Kb. Verizon kept calculating the resulting amount as $71.79. The problem, of course, is that the actual result should be 71.79 cents. The worst part was when the Verizon guy couldn’t tell the difference between .002 dollars and .002 cents. I suspect that the actual rate was supposed to be $0.002, but that’s not what they kept saying to the guy.
I think we can all relate to trying to explain a concept that’s so blindingly, earth-shatteringly obvious and mathematically irrefutable that there’s just no way to explain it gracefully. It is the height of frustration.
Anyway, I think it’s about time to go double-check my cellphone bill.