Purity Ice Cream Company bought a new ice cream maker at the beginning of the year at a cost of $24,000 The estimated useful life was four years, and the residual value was $2,160. Assume that the estimated productive life of the machine was 10,400 hours. Actual annual usage was 4,160 hours in year 1; 3,120 hours in year 2; 2,080 hours in year 3; and 1,040 hours in year 4. Required: 1. Complete a separate depreciation schedule for each of the alternative methods. (Do not round intermediate calculations.) a. Straight-line. Depreciation Accumulated Net Year Expense Depreciation Book Value At acquisition 4