Please help with this question:

Shown below is information relating to the stockholders' equity of Brookdale Corporation at December 31, Year 1:

11% cumulative preferred stock, $130 par value; authorized, 100,000 shares; issued and outstanding, 10,000 shares $ 1,300,000 Common stock, $1.25 par value; authorized, 1,000,000 shares; issued, 600,000 shares (of which 6,000 are held in treasury) 750,000 Additional paid-in capital: Preferred stock 500,000 Common stock 900,000 Treasury stock transactions 6,000 Treasury stock (at cost: 6,000 common shares) (192,000) Retained earnings 1,350,000

How many shares of common stock are outstanding?