A machine cost $800,000 on April 1, 2014. Its estimated salvage value is $80,000 and its expected life is eight years. Calculate the depreciation expense by Straight-line for 2014. Calculate the depreciation expense by Double-declining balance for 2015. Calculate the depreciation expense by Sum-of-the-years'-digits for 2015. Which method would result in the greatest income amount for 2015? Which method would result in the smallest income amount for 2015? Which method would result in the greatest income am Sum-of-the-years'-digits depreciation Double-declining balance depreciation Straight-line depreciation