Strong Metals Inc. purchased a new stamping machine at the beginning of the year at a cost of $997,500. The estimated residual value was $52,500. 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 a. Straight-line. b. Units-of-production. c. Double-declining-balance