2.00 488 Knife Edge Company purchased tool sharpening equipment on July 1, 2015, for $16,200. The equipment was expected to have a useful life of three years and a residual value of $900. Instructions: a. Determine the amount of depreciation expense for the years ended December 31, 2015, 2016, 2017 and 2018 by the straight-line method. Depreciation Expense 4.00 1.00 2015 2,550 2016 5,100 2017 5,100 2018 2,550 b. Determine the amount of depreciation expense for the years ended December 31, 2015, 2016, 2017 and 2018 by the double-declining-balance method. Round the double-declining-balance depreciation rate to six decimal places and round your final answers to the nearest whole dollar. Depreciation Expense 2015 2016 2017 2018 10,000 x 3,600 x 1,200 x 900 x Precious