Jake's Roof Repair has provided the following data concerning its costs. Fixed Cost Cost per Repair-Hour Wages and salaries Parts and supplies Equipment depreciation Truck operating expenses Rent Administrative expenses per Month 3 20,700 $15.00 $7.30 $2,788 $0.45 $5,780 $1.90 $4,660 $ 3,870 $0.50 For example, wages and salanes should be $20,700 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 $51.00 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 (l.e., zero variance). Input all amounts as positive values.) Jake's Roof Repair Activity Variances For the Month Ended May 21 Revenue Expenses Wages and salaries Parts and supples Equipment depreciation Truck operating expenses Rent Administrative signs Total expense Net operating income