Book Value for Preferred and Common Stock

The stockholders equity section of Bianca Corporations balance sheet follows. Assuming one year's dividend in arrears, determine the book value per share for both the preferred and the common stock. (Round to the nearest cent.)

Contributed capital:

Preferred stock, $100 per share, callable at $105, 6 percent cumulative, 10,000 shares authorized,

200 shares issued and outstanding----------$20,000

Common stock, $5 par value, 100,000 shares authorized, 10,000 shares issued,

9,000 shares outstanding-----------------------$50,000

Additional paid-in capital----------------------------$28,000

Total contributed capital-----------------------------$98,000

Retained earnings-------------------------------------$95,000

Total contributed capital and retained earnings---$193,000

Less treasury stock, common (1,000 shares at cost)------$15,000

Total stockholders equity------------------------$178,000

Please provide the formula for the ratio and the numbers you inputted so I can learn what to do next time