Perdue Company purchased equipment on April 1 for $41,970. The equipment was expected to have a useful life of three years, or 5,700 operating hours, and a residual value of $2,070. The equipment was used for 1,000 hours during Year 1, 2,000 hours in Year 2, 1,700 hours in Year 3, and 1,000 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.