The stockholders' equity section of Clay Corporation's balance sheet consists of the following amounts:

Common stock (5,000 shares) $50,000

Paid-in capital in excess of par value-common 10,000

Preferred stock (1,000 shares) 20,000

Paid-in capital in excess of par value-preferred 5,000

Retained earnings 15,000

Preferred stock is entitled to par value of $20 per share in liquidation, and all dividends have been paid to date including the current year's dividend. What is the book value per share for preferred and common, respectively?

A) $25 and $15

B) $20 and $16

C) $20 and $12

D) $25 and $12