The Stockholders' Equity section of the December 31, 2017, balance sheet of Eldon Company appeared as follows: Preferred stock, $50 par value, 5,000 shares
authorized, ? shares issued $300,000
Common stock, ? par, 10,000 shares authorized,
7,000 shares issued 70,000
Additional paid-in capital—Preferred 10,800
Additional paid-in capital—Common 420,000
Additional paid-in capital—Treasury stock 2,000
Total contributed capital $802,800
Retained earnings 40,000
Treasury stock, preferred, 100 shares (3,500)
Total stockholders’ equity $ ?

The per-share book value of the common stock assuming that there are no dividends in arrears and that the preferred stock can be redeemed at its par value
$ per share