Yello Bus Lines uses the units-of-activity method in depreciating its buses. One bus was purchased on January 1, 2020, at a cost of $226,472. Over its 4-year useful life, the bus is expected to be driven 139,600 miles. Salvage value is expected to be $7,300. Your answer is correct. Compute the depreciable cost per unit. (Round answer to 2 decimal places.e.g. 0.50) Depreciation cost per unit $ 1.57 per mile e Textbook and Media Computation End of Units of Activity Depreciation Cost/Unit Annual Depreciation Expense Accumulated Depreciation Year 2020 2021 2022 2023 End of Year Annual Depreciation Expense Accumulated Book Depreciation Value $