I have received parking violation ticket at school parking lot.
Fine is $75, my family having economic difficulty. 
$75 is a lot of money to me, I’d like to file an appeal to school parking services.

I have no idea how to write an appeal. Please help me!

I purchase a parking permit and registered my own vehicle when I purchase it.  

It is a sticker so I suppose to put it on the rear of the vehicle on the driver’s side, either on the vehicle window or on the rear bumper.

Here is my situation,
I work for the used car dealership, I drive company’s car occasionally.
so I usually stick my parking permit on the rear of the vehicle window instead of put a sticker on window permanently.
That way I can take my parking permit to other vehicles when I am driving company’s car.
Anyway, I was driving my own vehicle that day I displayed parking permit on the rear of the vehicle on the driver’s side
but it was very windy day I was driving while my window was down 
somehow my parking permit fall off from the vehicle’s window and it was on my backseat.
I didn’t know that until I see a parking violation ticket on my windshield.

My point is this school parking service has my car license plate number and all other information.
So I know it was my fault that my parking permit wasn’t displayed at that time but I hope you can excuse my situation.

Thanks