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 $233,839. Over its 4 -year useful life, the bus is expected to be driven 139,900 miles. Salvage value is expected to be $8,600. (a) Compute the depreciable cost per unit. (Round answer to 2 decimal places, eg. 0.50.) Depreciable cost per unit per mile eTextbook and Media Attempts: unlimited (b) The parts of this question must be completed in order. This part will be available when you complete the part above