Potbelly Sioves has undertaken a 560 million expansion. They raised the capital by borrowing $25 million, issuing $8 in preferred stock and utilizing $27 million in retained earnings. Determine the company's WACC if the interest rate on newdebt is 6.15%, the yield on the preferred is 4.75%, the cost of retained earnings is 7.35%. Potbelly faces a 34% marginal tax rate.