Joan has a choice of purchasing a car for $20,000 with 9.7 percent interest cost to borrow and a three-year repayment period for leasing the vehicle. Leasing the auto would cost $300 a month for a three-year term. The sales tax is 6 percent. The car is expected to have a value of $14,000 at the end of the leasing period. Joan can obtain 7 percent after tax on similar marketable investments. Should she lease or buy the car

"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."