McCall Corporation has a capital structure consisting of 55% common equity, 30% debt, and 15% preferred stock. Any debt issues would have a pre-tax cost of 9.5%. Preferred stock can be issued for a cost of 11.5%. Common equity can be issued, but flotation costs of $4.25 per share of common stock would be paid. McCall common stock is currently selling in the market at $65 per share. McCall recently paid a dividend of $4 per share and company earnings and dividends are expected to grow at an annual rate of 8% indefinitely. McCall has a marginal tax rate of 35% and the firm wants to keep its current capital structure.

If the firm needs to raise additional equity, what will be firm's cost of capital?