Copy equipment was acquired at the beginning of the year at a cost of $21,020 that has an estimated residual value of $1,900 and an estimated useful life of 5 years. It is estimated that the machine will output an estimated 956,000 copies. This year, 271,000 copies were made. a. Determine the depreciable cost. b. Determine the depreciation rate. per copy c. Determine the units-of-output depreciation for the year