Subject: mathqa
Question: it costs $ 2 for the first 15 minutes to use the bumper cars at a fair ground . after the first 15 minutes it costs $ 6 per hour . if a certain customer uses the bumper cars for 3 hours and 25 minutes , how much will it cost him ?
Option: 
A: $ 21
B: $ 22
C: $ 3
D: $ 30
Answer: A