Yello Bus Lines uses the units-of-activity method in depreciating its buses. One bus was purchased on January 1, 2022, at a cost of $205,860. Over its 4-year useful life, the bus is expected to be driven 141,400 miles. Salvage value is expected to be $7,900. (a) Your answer is correct. Compute the depreciable cost per unit. (Round answer to 2 decimal places, eg. 0.50) Depreciable cost per unit $ eTextbook and Media 14 per mile