The following data has been collected about Keller Company's stockholders' equity accounts: Common stock $10 par value 23,000 shares authorized and 11,500 shares issued, and 1,300 shares outstanding Paid-in capital in excess of par value, common stock Retained earnings Treasury stock $ 115,000 53,000 28,000 15,340 Assuming the treasury shares were all purchased at the same price, the number of shares of treasury stock is