E9-5 Copacabana Bus Lines uses the units-of-activity method in depreciating its buses. Compute depreciation under One bus was purchased on January 1, 2017, at a cost of R$145,000. Over its 4-year useful units of activity method. life, the bus is expected to be driven 100,000 miles. Residual value is expected to be (LO 2) R$15,000. Instructions (a) Compute the depreciable cost per unit. (6) Prepare a depreciation schedule assuming actual mileage was 2017, 27,000; 2018, 32,000; 2019, 24,000; and 2020, 17,000