Perdue Company purchased equipment on April 1 for $62,640. The equipment was expected to have a useful life of 3 years, or 8,100 operating hours, and a residual value of $1,890. The equipment was used for 1,500 hours during Year 1, 2,800 hours in Year 2, 2,400 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, (c) the double-declining-balance method.

c. Double-declining-balance method