Depreciation by Three Methods; Partial Years Razar Sharp Company purchased equipment on July 1, 2014, for $76,680. The equipment was expected to have a useful life of three years, or 6,480 operating hours, and a residual value of $2,160. The equipment was used for 1,200 hours during 2014, 2,300 hours in 2015, 1,900 hours in 2016, and 1,080 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 multiplier to four decimal places. Then round the answer for each year to the nearest whole dollar. a. Straight-line method Year Amount 2014 $ 2015 $ 2016 $ 2017 $ b. Units-of-output method Year Amount 2014 $ 2015 $ 2016 $ 2017 $ c. Double-declining-balance method Year Amount 2014 $ 2015 $ 2016 $ 2017 $.