Depreciation by Three Methods; Partial Years Layton Company purchased tool sharpening equipment on October 1, 2014, 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 2014, 4,200 hours in 2015, 3,650 hours in 2016, and 2,800 hours in 2017. Required: Determine the amount of depreciation expense for the years ended December 31, 2014, 2015, 2016, and 2017, by (a) the straight line method, (b) units-of-output method, and (c) the double declining-balance method. Note: FOR DECLINING BALANCE ONLY, round the answer for each year to the nearest whole dollar. a. Straight-line method Year 2014 2015 2016 2017 Amount b. Units-of-output method Amount Year 2014 2015 2016 a. Straight-line method Year 2014 2015 2016 2017 Amount b. Units-of-output method Year 2014 2015 2016 2017 Amount c. Double-declining-balance method Year 2014 2015 2016 2017 Amount