Based on the corporate valuation model, Hunsader's value of operations is $300 million. The balance sheet shows $20 million of short-term investments that are unrelated to operations, $50 million of accounts payable, $90 million of notes payable, $30 million of long-term debt, $40 million of preferred stock, and $100 million of common equity. The company has 10 million shares of stock outstanding. What is the best estimate of the stock's price per share