You used an app to hire a repair worker to do a series of small repairs around your office. The worker charges $54 for the first hour, and $15.50 for each additional 15 minutes. If the worker charged you $162.50, how long did the repairs take?
A. 3 hours 15 minutes
B. 2 hours 25 minutes
C. 2 hours 45 minutes
D. 4 hours 30 minutes