Year Amount Year 1 Year 2 Year 3 Year 4 $ 25,200 b. Units-of-activity method Year Amount Year 1 $ 11,340 Year 2 $ 35,280 Year 3 $ 30,660 Year 4 23,520 c. Double-declining-balance method Year Amount Year 1 A Year 2 A Year 3 A Year 4 Feedback Depreciation by Three Methods; Partial Years Layton Company purchased tool sharpening equipment on October 1 for $108,000. The equipment was expected to have a useful life of three years or 12,000 operating hours, and a residual value of $7,200. The equipment was used for 1,350 hours during Year 1, 4,200 hours in Year 2, 3,650 hours in Year 3, and 2,000 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: FOR DECLINING BALANCE ONLY, round the multiplier to five decimal places. Then, round the answer for each year to the nearest whole dollar. a. Straight-line method