Sterling Steel Inc. purchased a new stamping machine at the beginning of the year at a cost of $620,000. The estimated residual value was $69,800. Assume that the estimated useful life was five years, and the estimated productive life of the machine was 262,000 units. Actual annual production was as follows:

Year Units

1. 75,000

2. 64,000

3. 32,000

4. 55,000

5. 36,000

Required: 1. Complete a separate depreciation schedule for each of the alternative methods. (Round your answers to the nearest dollar amount. Do not round your intermediate calculations.

a.

Straight-line.

b.

Units-of-production.

c.	Double-declining-balance. (please help me)