At the beginning of the year. Palermo Brothers. Inc.. purchased a new plastic water bottle making machine at a cost of $54,000. The estimated residual value was $6,000. Assume that the estimated useful life was four years, and the estimated productive life of the machine was 480.000 units. Actual annual production was as follows: Complete a separate depreciation schedule for each of the alternative methods. a. Straight-line. b. Units-of-production. c. Double-declining-balance