Whippet Bus Lines uses the units-of-activity method in depreciating its buses. One bus was purchased on January 1, 2025, at a cost of $100,000. Over its 4-year useful life, the bus is expected to be driven 160,000 miles. Salvage value is expected to be $8,000.

Instructions
a. Compute the depreciation cost per unit.
b. Prepare a depreciation schedule assuming actual mileage was 2025, 40,000; 2026, 52,000; 2027, 41,000; and 2028, 27,000.