5-Calculate depreciation. A machine cost $900,000 on April 1, 2017. Its estimated salvage value is $90,000 and its expected life is eight years. Instructions (1) Calculate the depreciation expen se (to the nearest dollar) by each of the following methods, showing the figures used. (a) Straight-line for 2017 (b) Double-declining balance for 2018 (c) Sum-of-the-years'-digits for 2018 Which method would result in the smallest income amount for 2018