E8-10 (Algo) Computing Depreciation under Alternative Methods LO8-3 Strong Metals Incorporated purchased a new stamping machine at the beginning of the year at a cost of $1,520,000. The estimated residual value was $80,000. Assume that the estimated useful life was five years and the estimated productive life of the machine was 300,000 units. Actual annual production was as follows: Year Units 1 70,000 2 67,000 3 50,000 4 73,000 5 40,000 Required: 1. Complete a separate depreciation schedule for each of the alternative methods. Straight-line. Units-of-production. Double-declining-balance