Perdue Company purchased equipment on April 1 for $56,430. The equipment was expected to have a useful life of three years, or 7,800 operating hours, and a residual value of $1,830. The equipment was used for 1,400 hours during Year 1, 2,700 hours in Year 2, 2,300 hours in Year 3, and 1,400 hours in Year 4.

Required:

Determine the amount of depreciation expense for the years ended December 31, Year 1, Year 2, Year 3, and Year 4, by (a) the straight-line method, (b) the units-of-activity method, and (c) the double-declining-balance method.

Note: Round all final values for each depreciation method and each year to the nearest whole dollar.

a. Straight-line method

Year	Amount
Year 1
Year 2
Year 3
Year 4

b. Units-of-activity method

Year	Amount
Year 1
Year 2
Year 3
Year 4

c. Double-declining-balance method

Year	Amount
Year 1
Year 2
Year 3