According to Verizon, at least.
Long story short, guy gets quoted .002 cents/kb and then charged .002 dollars/kb. This is part of his customer service call to the company:
Longer version (27 min) of that same call can be found here:
VerizonMath: Original Recording of Verizon Customer Service Call
It is also the most frustrating recording you will hear in a long time, if you do choose to listen to it.