Filmore Corporation is authorized to issue 18,000 shares of no-par common stock. The company issued 8,000 shares of common stock on January 1 of the current year at $4 per share. On January 15 of the current year, the company issued another 4,000 shares at $8 per share. What is the additional amount of stockholders' equity for the month of January from the issuance of common stock? A. $72,000 B. $64,000 C. $32,000 D. $144,000