Layton Company purchased tool sharpening equipment on October 1 for $24,570. The equipment was expected to have a useful life of 3 years or 4,320 operating hours, and a residual value of $810. The equipment was used for 800 hours during Year 1, 1,500 hours in Year 2, 1,300 hours in Year 3, and 720 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-ofactivity 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 near. a. Straight-line method b. Units-of-activity method a. Straight-line method b. Units-of-activity method c. Double-declining-balance method