Sual Company purchased a tractor at a cost of $180,000. The tractor has an estimated salvage value of $20,000 and an estimated life of 8 years, or 12,000 hours of operation. The tractor was purchased on January 1, 2019 and was used 2,400 hours in 2019 and 2,200 hours in 2020. What method of depreciation will produce the maximum depreciation expense in 2020

"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."