Update:

Just received a bill for $135. I am being charged $47 for an attempt to repair the tire plus roadside assistance (which I did not use), then an additional $68 for a new tire once they determined that they could not repair the tire, plus a $20 administrative fee.

I'm sorry, but I call BS on this one. How could it possibly cost $47 to attempt to repair a tire? The notes on the claim say "screw in tire too close to sidewall for repair" -- surely that's something that can be figured out before you attempt to repair the tire? I've had screws taken out of tires and tires patched before, and at most it costs $15 (and that's at inflated Los Angeles prices). I also didn't use roadside assistance, so that's BS too!

I called the number on the form and the woman sort of chuckled and said, yeah, they throw all kinds of extra charges on there in the hopes that people will pay. She backed out the administrative fee and the roadside assistance for me.

She also warned me to be very careful to not accept a car with any kind of windshield chip or crack, and to check all tires carefully, because Avis has started charging everyone that had the car with a chip or a screw/nail in the tire, regardless of who had the car when the damage was incurred. She told me that Avis is "really going after people" now in order to make some money.

Lesson learned...