Purity Ice Cream Company bought a new ice cream maker at the beginning of the year at a cost of $12,000. The estimated useful life was four years, and the residual value was $960. Assume that the estimated productive life of the machine was 9,200 hours. Actual annual usage was 3,680 hours in year 1; 2,760 hours in year 2; 1,840 hours in year 3; and 920 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