Jake's Roof Repair has provided the following data concerning its costs: Fixed Cost Cost per per Month Repair-Hour Wages and salaries. Parts and supplies Equipment depreciation $ 21,200 $ 15.00 $ 7.40 $ 2,700 $ 0.45 Truck operating expenses Rent $ 5,700 $ 1.90 $ 4,640 $ 3,850 $ 0.70 Administrative expenses For example, wages and salaries should be $21,200 plus $15.00 per repair-hour. The company expected to work 2,600 repair- hours in May, but actually worked 2,500 repair-hours. The company expects its sales to be $50.00 per repair-hour. Required: Compute the company's activity variances for May. Note: 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: Jake's Roof Repair Activity Variances For the Month Ended May 31 Wages and salaries Parts and supplies Equipment depreciation Truck operating expenses Rent Administrative expenses Total expense Net operating income