Response to debbieb -- I don't have a corporate rate for gas. This wasn't a corporate rental.

To answer ezmonee's post, when I was asked whether "I bought gas," I replied, "No, the tank is not full," and the attendant looked at the dashboard (first time). I got out of the car, and gave the attendant the keys, and she started doing paperwork, whereas I cleaned up the car and pulled my luggage out. She then got into the driver's seat and looked at the dashboard (second time). I asked her how much it'll cost me for the difference in gas and she responded "it's only a 1/4 tank [missing], so it shouldn't be too bad." When she handed me a receipt for the non-package add'l item for $93.75, I didn't follow up with asking what the charge was for, but in just believing her and rushing towards the AVIS shuttle bus.... I'm such an idiot.