Strong Metals Inc. purchased a new stamping machine at the beginning of the year at a cost of $1,000,000. The estimated residual value was $92,800. Assume that the estimated useful life was five years, and the estimated productive life of the machine was 324,000 units. Actual annual production was as follows:

Year	Units
1	86,000
2	74,000
3	41,000
4	69,000
5	54,000

Required:

1. Complete a separate depreciation schedule for each of the alternative methods. (Do not round your intermediate calculations.)

a. Straight-line.

b. Units-of-production.

c. Double-declining-balance.