Sand key development company has a capital structure consisting of $20 million of 10% debt and $30 million of common equity. the firm has 500,000 shares of common stock outstanding. sand key is planning a major expansion and will need to raise $15 million. the firm must decide whether to finance the expansion with debt or equity. if equity financing is selected, common stock will be sold at $75 per share. if debt financing is chosen, 5% coupon bonds will be sold. the firm's marginal tax rate is 34%. determine the level of operating income at which sand key would be indifferent between debt financing and equity financing.