Exercise 9-19 Whippet Bus Lines uses the units-of-activity method in depreciating its buses. One bus was purchased on January 1, 2017, at a cost of $119,000. Over its 4-year useful life, the bus is expected to be driven 210,000 miles. Salvage value is expected to be $7,700. Compute the depreciation cost per unit. (Round answer to 3 decimal places, e.g. 6.251) Depreciation cost per unit s o; 2019, 48 79 and 2020 32 10 Round depreciation cost perunit to 3 decima/ places, eg Prepare a depreciation schedule assuming actual mileage was: 2017, 47,600; 2018, ? 0.125 and other answers to O decimal places, e.g. 125) Computation End of Year Years Units of Activity X Depreciation Cost/UnitAnnual Depreciation Expense Accumulated Depreciation Book Value 2017 2018 2019 2020