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20. Feast Inc. plans t o maintain its optimal capital structure of 40% debt, 10% preferred stock, and 50% common equity indefinitely. The pre-tax required return on each component source of capital is as follows: debt 8%; preferred stock 12%; common equity 16%. Assuming a 40% marginal tax rate, what after-tax weighted average cost of capital can we infer for the firm? A) 10.64% B) 12.40% 11.12% ) 12.00% deht40 es loolo 1200.-1.20(6