A machine cost $900,000 on April 1, 2020. Its estimated salvage value is $90,000 and its expected life is eight years.

(1) Calculate the depreciation expense (to the nearest dollar) by each of the following methods, showing the amounts used.

(a) Straight-line for 2020

(b) Double-declining balance for 2021

(c) Sum-of-the-years'-digits for 2021

(2) Which method would result in the smallest income amount for 2021?

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