Younger Bus Lines uses the units-of-activity method in depreciating its buses. One bus was purchased on January 1, 2012, at a cost of $168,000. Over its 4-year useful life, the bus is expected to be driven 100,000 miles. Salvage value is expected to be $8,000. Compute the depreciation cost per unit. (Round answer to 2 decimal places, e.g. 10.50.) $ Complete the depreciation schedule assuming actual mileage was: 2012, 26,000; 2013 32,000; 2014 25,000; and 2015 17,000. End of Year Year Annual Depreciation Expense Accumulated Depreciation Book Value 2012 $ $ $ 2013 2014 2015