4. 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 expense (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 (2) Which method would result in the smallest income amount for 2018