The following data has been collected about Keller Company's stockholders' equity accounts: Common stock $10 par value 19,000 shares authorized and 9,500 shares issued, 2,100 shares outstanding $95,000 Paid-in capital in excess of par value, common stock 49,000 Retained earnings 24,000 Treasury stock 23,940 Assuming the treasury shares were all purchased at the same price, the number of shares of treasury stock is: