Depreciation by Two Methods; Partial Years 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, 20Y6, 2017 and 2018 by the straight-line method. Depreciation Expense 2015 2016 2017 2018 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 20YS 2016 2017 2018