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A. Computing Depreciation under Alternative Methods Strong Metals Inc. purchased a new stamping machine at the beginning of the year at a cost of $950,000. The estimated residual value was $50,000. 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: Required: Complete a separate depreciation schedule for each of the alternative methods. a. Straight-line. b. Activity-based (Units-of-production). c. Double-declining-balance