who requested the service in (b)? Someone had to ... they didn't just find out on their own and show up, right?
You can try to negotiate, but in the end you probably owe the difference, especially if you were at fault since had you not caused the accident, the other driver wouldn't have needed them either. How do you know the other person was NOT billed also? And it is possible that the other driver does pay taxes to that township. Whether the fire dept EMS will do anything with the bill is unknown. You might check with an attorney in that township to see what your options are. They may have a better idea on whether they will try to collect.

