Amazing Food Supermarkets' balance sheet shows $300 million in debt, $50 million in preferred stock, and $250 million in total common equity. The respective cost of the various components of its capital structure is as follows: after tax r = 5.04%, [ps =7.24%, and r = 10.45%. If Amazing Food has a target capital structure of 30% debt, 5% preferred stock, and the balance in common stock, what is Amazing Food's weighted average cost of capital (WACC)?