G. Sheffield Corporation was organized on January 1, 2020, with authorized capital of 1150000 shares of $10 par value common stock. During 2020, Sheffield issued 69000 shares at $13 per share, purchased 6400 shares of treasury stock at $14 per share, and sold 6400 shares of treasury stock at $15 per share. What is the amount of additional paid-in capital at December 31, 2020?