Jake's Roof Repair has provided the following data concerning its costs For example, wages and salanes should be $20,900 plus $15,00 per repair-hour. The company expected to work 2.800 repair-hours in May, but actually worked 2,700 repatr-hours, The company expects its sales to be $46.00 per repair-hour. Required: Compute the company's activity variances for May. (Indicate the effect of each varience by selecting "F" for fovorable, "U" for unfovorable, and "None" for no effect (l.e., zero varlance). Input all amounts as positive values.)