The units-of-output depreciation method 2. On January 1, 20X6, Outback Air purchased a new engine for one of its airplanes used to transport adventurers to remote regions of western Australia. The engine cost $750,000 and has a service life of 10,000 flight hours. Regulations require careful records of usage, and the engines must be replaced or rebuilt at the end of the 10,000 hour service period. Outback uses the units-of-output depreciation method. (a) Assuming that the engine was used as follows, prepare a schedule showing annual depreciation expense, accumulated depreciation, and related calculations for each year. 20X6 1,500 hours 20x7 4,000 hours 20X8 3,000 hours 20x9 1,500 hours Annual Expenses calculation Year Depreciation Expenses Accumulated Depreciation at end of the year 20X6 20X7 20X8 20X9