Purity Ice Cream Company bought a new ice cream maker at the beginning of the year at a cost of $18,000. The estimated useful life was four years, and the residual value was $1,840. Assume that the estimated productive life of the machine was 10,100 hours. Actual annual usage was 4,040 hours in year 1; 3,030 hours in year 2; 2,020 hours in year 3; and 1,010 hours in year 4.

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

a.

.

Straight-line.

b

units-of-production (use four decimal places for the per unit output factor).

c.	Double-declining-balance