Lyman Company has the opportunity to increase annual credit sales $100,000 by selling to a new, riskier group of customers. The expenses of collecting credit sales are expected to be 15 percent of credit sales. The company's manufacturing and selling expenses are projected at 70% of sales, and its effective tax rate is 40%. If Lyman accepts this opportunity, its after-tax profits would increase by an estimated:. a. $10,200.
b. $10,000.
c. $9,000.
d. $14,400.

"jake’s roof repair has provided the following data concerning its costs: fixed cost per month cost per repair-hour wages and salaries $ 20,900 $ 15.00 parts and supplies $ 7.70 equipment depreciation $ 2,800 $ 0.35 truck operating expenses $ 5,720 $ 1.60 rent $ 4,690 administrative expenses $ 3,850 $ 0.50 for example, wages and salaries should be $20,900 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 $47.00 per repair-hour. required: compute the company’s activity variances for may."