Jake's Roof Repair has provided the following data concerning its costs: For example, wages and salaries should be $20,900 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 $44.00 per repair-hour: Required: Compute the company's activity variances for May (Indicate the effect of each varlance by selecting "F" for favorable, " U " for unfavorable, and "None" for no effect (Le,, zero variance). Input all amounts as positive values.)