The following partial stockholders' equity information was found on the balance sheet of the Dallas Company as of December 31, 2020. Preferred stock; cumulative: 10%, $50 par value; 20,000 shares authorized; 8,000 shares issued and outstanding Common stock; $___?par value; 200,000 shares authorized: 20,000 shares issued: 15,000 shares outstanding. Additional paid in capital Total paid in capital On preferred stock On common stock $100,000 250,000 480,000 Retained earnings 120,000 Treasury stock. ?? common shares at cost. $10 per share Total stockholders' equity What is the par value of the Common Stock? Select one: a. .50 b. 5.00 c. 23.20 d. 4.00