This question and the next question are based on the following data: Gina's Auto Repair Shop uses standards to control labor time and labor cost in the shop. The standard time for a motor tune-up is 3 hours. The record showing time spent in the shop last week on tune-ups has been misplaced; however, the shop supervisor recalls that 40 tune-ups were completed during the week and the controller recalls that the labor rate variance on tuneups was $100, unfavorable. The shop has a set standard labor rate of $12 per hour for tune-up work. The total (spending) labor variance for the week on tune-up work was $160 unfavorable. The number of actual hours spent on tune-up work last week was: 125 hours 105 hours 145 hchirs 160 hours 135 hours