PlasticWorks Corporation bought a machine at the beginning of the year at a cost of $24,250. The estimated useful life was five years, and the residual value was $3,750. Assume that the estimated productive life of the machine is 20,500 units. Expected annual production was: year 1, 6,500 units; year 2, 6,500 units; year 3, 3,750 units; year 4, 2,050 units; and year 5, 1,700 units

Double-declining-balance.

	Income Statement	balance sheet
Year	Depreciation expenses	Cost	Accumulated Depreciation	Book value
At acquisition
1
2
3
4