Depreciatlan by Three Methods, Partial Years Perdue Company purchased equipment on october 1 for 354,940 . The equipment was expected to have a useful life of three years, or 7,600 operating hours, and a residual valuar of 51,740 . The equipment was used for 1,400 hours during Yeor 1,2,700 hours in Year 2, 2,300 hours in Year 3 , and 1,200 hours in Year 4 . Required Dutermine the amount of depreciation expense for the years ended December 31, Year 1, Year 2, Year 3, and Year 4, by (a) the straight-ling mechod, (b) the units-of-activify method, and (c) the double-decining-bbalance method. a. Straight-line method b. Units-of-activity method c. Double-declining-balance method