eported the following information at December 31:

Preferred Stock, $3 par, 10,000 shares authorized	$ 8,700
Additional paid-in capital preferred stock	17,400
Common stock, $2.50 par, 16,000 shares authorized	20,000
Additional paid-in capital common stock	8,800
Retained earnings	27,000
Treasury stock, at cost of $5 per share	(3,000	)
Total	$78,900

How many shares of common stock are outstanding?