iation under method. E10-5B Stilley Bus Lines uses the units-of-activity method in depreciating its buses. One bus was purchased on January 1, 2017, at a cost of $188,000. Over its 4-year useful life, the bus is expected to be driven 100,000 miles. Salvage value is expected to be $8,000. Instructions (a) Compute the depreciation cost per unit. (b) Prepare a depreciation schedule assuming actual mileage was: 2017, 27,000; 2018, 34,000; 2019, 24,000; and 2020, 15,000