Depreciation by three methods; partial years Layton Company purchased tool sharpening equipment on October 1 for $109,080. The equipment was expected to have a useful life of 3 years or 7,560 operating hours, and a residual value of $3,240. The equipment was used for 1,400 hours during Year 1, 2,600 hours in Year 2, 2,300 hours in Year 3, and 1,260 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 four decimal places. Then round the answer for each year to the nearest whole dollar. a. Straight-line method Year Amount Year 1 8,820 Year 2 35,280 Year 3 $ 35,280 Year 4 b. Units-of-activity method Year Amount Year 1 19,600 Year 2 36,400 Year 3 32,200 Year 4 17,640 c. Double-declining-balance method Year Amount Year 1 5,879 X c. Double-declining-balance method Year Amount Year 1 5,879 X Year 2 Year 3 $ $ Year 4