a machine that cost $594,000 has an estimated residual value of $27,000 and an estimated useful life of 27,000 machine hours. the company uses units-of-production depreciation and ran the machine 7,000 hours in year 1, 9,000 hours in year 2, and 8,000 hours in year 3. required:a machine that cost $594,000 has an estimated residual value of $27,000 and an estimated useful life of 27,000 machine hours. the company uses units-of-production depreciation and ran the machine 7,000 hours in year 1, 9,000 hours in year 2, and 8,000 hours in year 3. required: