Bob's bank charges him a $3.15 service fee every time he uses an out-of-network ATM. If Bob uses an out-of-network ATM an average of three times every two weeks, how much will he pay in service fees over the course of a year?
a. $327.60
b. $109.20
c. $491.40
d. $245.70
Please select the best answer from the choices provided