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

Common stock $10 par value 15,000 shares authorized and 7,500 shares issued, 2,500 shares outstanding	$75,000
Paid-in-capital in excess of par value, common stock	45,000
Retained earnings	20,000
Treasury stock	27,250

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