The Auto Repair Shop of Empire Motor Sales Uses Standards

The auto repair shop of Empire Motor Sales uses standards to control labor time and labor cost in the shop. The standard time for a motor tune-up is 2.5 hours. The record showing time spent in the shop last week on tune-ups has been misplaced; however, the shop supervisor recalls that 50 tune-ups were completed during the week and the controller recalls that the labor rate variance on tune-ups was $87, favorable. The shop has a set standard labor rate of $9 per hour for tune-up work. The total labor variance for the week on tune-up work was $93, unfavorable.
-The number of actual hours spent on tune-up work last week was:

A) 125 hours
B) 105 hours
C) 145 hours
D) Cannot be computed without further information