At the End of the Accounting Period, Houston Company Had

At the end of the accounting period, Houston Company had $6,400 of par value common stock issued, additional paid-in capital in excess of par value − common of $7,900, retained earnings of $7,000, and $4,000 of treasury stock. The total amount of stockholders' equity is:

A) $25,300.
B) $10,300.
C) $18,900.
D) $17,300.