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4. The table below details three possible alternatives to replace existing machinery The life of each alternative is 5 years. Assuming the cost of capital is 10%, depreciation for tax purposes of capital expenditure is allowable at 30% on a declining balance basis and the effective tax rate is 45%. Determine the preferred alternative. Alternative Salvage value $ A B Capital Expenditure $ 700,000 900,000 1,300,000 Annual Operating cost $ 200,000 130,000 70,000 100,000 150,000 300,000