Depreciation by Three Methods; Partial Years Layton Company purchased tool sharpening equipment on October 1 for $46,710. The equipment was expected to have a useful life of three years or 7,560 operating hours, and a residual value of $1,350. 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 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 NERVUIL Year 1 Year 2 Year 3 Year 4 b. Units-of-activity method