Jake's Roof Repair has provided the following data concerning its costs: Fixed cost per month $ 21,000 Wages and salaries Parts and supplies Equipment depreciation Truck operating expenses Ront Administrative expenses Cost per Hepair Hour $15.00 5 710 $0.30 $ 1.70 $2,750 $5,790 $4,600 $ 3,840 $ 0.80 For example, wages and safarles should be $21.000 plus $15.00 per repair-hour. The company expected to work 2.700 repair-hours in May, but actually worked 2.600 repair-hours. The company expects its sales to be $46.00 per repair-hour Required: Compute the company's activity varlances for May. (Indicate the effect of each variance by selecting "F" for favorable. "U" for unfavorable, and "None" for no effect (i.o. zero variance). Input all amounts os positive values.) Jake's Roof Repair Activity Variances For the Month Ended May 31 Revenue F Expenses Wages and salaries Parts and supplies Equipment depreciation Truck operating expenses Rent None U Administrative expenses Total expense Net operating income