Hansen Co. began business in Year1. Hansen, Co. showed the following stockholders equity section at December 31, Year2 (with certain information missing). All accounts have normal balances. Preferred stock, 6%, cumulative, par $50 10,000 shares authorized, ??? shares issued and outstanding $ 50,000 Common stock , par ??? 80,000 shares authorized 30,000 shares issued and 28,000 shares outstanding $ 300,000 Contributed capital in excess of par, common stock $ 510,000 Retained earnings $ 682,000 Treasury stock (common) $ 40,000 How much in total, have the common shareholders contributed to the corporation?