The following data has been collected about Keller Company's stockholders' equity accounts:

Common stock $10 par value 24,000 shares authorized and 12,000 shares issued, 1,400 shares outstanding	$120,000
Paid-in capital in excess of par value, common stock	54,000
Retained earnings	29,000
Treasury stock	16,660

Assuming the treasury shares were all purchased at the same price, the number of shares of treasury stock is: