Assume Purity Ice Cream Company, Inc., in Ithaca, NY, bought a new ice cream maker at the beginning of the year at a cost of $9,000. The estimated useful life was four years, and the residual value was $1,000. Assume that the estimated productive life of the machine was 16,000 hours. Actual annual usage was 5,500 hours in Year 1; 3,800 hours in Year 2; 3,200 hours in Year 3; and 3,500 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. Year Depreciation Expense Accumulated Depreciation Net Book Value At acquisition 1 2 3 4 b. Units-of-production (use four decimal places for the per unit output factor). Year Depreciation Expense Accumulated Depreciation Net Book Value At acquisition 1 2 3 4 c. Double-declining-balance. Year Depreciation Expense Accumulated Depreciation Net Book Value At acquisition 1 2 3 4