Staples Corporation's December 31, 2020 balance sheet showed the following: 8% preferred stock, $10 par value, cumulative, 20,000 shares authorized; 15,000 shares issued $ 150,000 Common stock, $10 par value, 2,000,000 shares authorized; 1,950,000 shares issued, 1,930,000 shares outstanding 19,500,000 Paid-in capital in excess of par-common stock 24,000,000 Retained earnings 7,650,000 Treasury stock (20,000 shares) 630,000 Staple's total stockholders' equity was a. $50,670,000. b. $43,710,000. c. $51,360,000. d. $50,730,000