I have no Idea what i am doing and need help with this chapter.

Jake's Roof Repair has provided the following data concerning its costs: Fixed Cost Cost per per Month RepairHour Wages and salaries $20,800 $15.00 Parts and supplies $ 7.70 Equipment depreciation $ 2,790 $ 0.40 Truck operating expenses 5 5,760 $ 1.70 Rent $ 4,700 Administrative expenses 5 3,830 S 0.60 For example, wages and salaries should be $20,800 plus $15.00 per repairhour. The company expected to work 2,800 repair-hours in May, but actually worked 2,700 repair-hours. The company expects its sales to be $54.00 per repair-hour. Required: Compute the company's activity variances for May. (Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect (i.e., zero variance). Input all amounts as positive values.) Revenue Expenses: Wages and salaries Parts and supplies Equipment depreciation Truck operating expenses Administrative expenses Total expense Net operating income