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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 $307.780. Over its 4-year useful life, the bus is expected to be driven 181,200 miles. Salvage value is expected to be $8,800. (a) Compute the depreciable cost per unit. (Round answer to 2 decimal places, e.g. 0.50.) Depreciable cost per unit $ per mile Cheyenne Corp, purchased a new machine on October 1, 2022, at a cost of $131,000. The company estimated that the machine will have a salvage value of $18,500. The machine is expected to be used for 10,000 working hours during its 5-year life. (a) Compute the depreciation expense under straight-line method for 2022. 2022 Depreciation expense