The following table lists the stockholders' equity accounts appearing on the balance sheet of a corporation on December 31, 2014. Answer the question below the table.
Account Amount
Common stock, $10 par value $300,000
Paid-in capital in excess of par - common 270,000
Preferred stock, 3%, $50 par value 125,000
Treasury Stock (1,200 shares) 30,000
Retained earnings 225,000
How many shares of preferred stock have been issued?