The expected average rate of return for a proposed investment of dollar600,000 in a fixed asset, with a useful life of four years, straight-line depreciation, no residual value, and an expected total net income of dollar240,000 for the 4 years, is: 40% 20% 60% 24% The amount of the estimated average income for a proposed investment of dollar90,000 in a fixed asset, giving effect to depreciation (straight-line method), with a useful life of four years, no residual value, and an expected total income yield of dollar21, 600, is: dollar10, 800 dollar21, 600 dollar5, 400 dollar45,000