A parking garage charges $2.00 for the first hour and $0.75 for each additional hour. If a customer gave the parking attendant $35 for parking from 10 AM to 3 PM, how much did the garage charge?
 Which piece of information is not necessary to solve the problem?
 $2.00 parking charges for the first hour
 $0.75 parking charges for each additional hour
 Amount of time the customer was parked
 $35 the customer gave the parking attendant