I immediately thought of VerizonMath, too.
Since it's referenced briefly, let me elaborate a bit for those that don't know:
Guy is quoted .002 cents per kb, is charged .002 dollars per kb. Calls in to dispute with customer service, they don't understand the difference between .002 cents and .002 dollars.
Blog detailing it was linked above by jambongris, but at least listen to the 3:22 condensed version (from 27 minute phone call), it's pretty hilarious:
https://www.youtube.com/watch?v=zN9LZ3ojnxYThe wife and I sometimes quote the "Well that's just a matter of opinion" to things that clearly aren't.
I lol'd at this thread the same thing happening with a few posters... whoops. :)
My opinion is that it's dollars/kWh, and their example is correct, but them saying cents/kWh is a mistake.