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 2,800 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 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 Year 4 $