UI AUSWUPS the 30) 30) Declining balance depreciation On July 6, 2017, Grayson purchased new machinery with an estimated useful life of 10 years. The cost of the equipment was $80,000, with a residual value of $8,000. Compute the depreciation on this machinery in 2017 and 2018 using each of the following methods. 2017 2018 (a) 150%-declining-balance, using the half-year convention (b) 200%-declining-balance, using the half-year convention