Depreciation by three methods; partial years razar sharp company purchased equipment on july 1, 2012, for $47,250. the equipment was expected to have a useful life of three years, or 5,400 operating hours, and a residual value of $1,350. the equipment was used for 1,000 hours during 2012, 1,900 hours in 2013, 1,600 hours in 2014, and 900 hours in 2015. required: determine the amount of depreciation expense for the years ended december 31, 2012, 2013, 2014, and 2015, 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.