What other approaches/methods can be used to measure the firms cost of common equity and thus its WACC? To that end, what additional info/data would you need? (Hint: A firms weighted average cost of capital is equal to = ()(1 - t) + , 6 where and are the weights of debt and equity in the capital structure; and are the respective costs of debt and equity; and t is the corporate tax rate; Do no round up your WACC figure.)