On January 1, Year 2, the Feather Company had 50,000 shares of common stock issued and outstanding. On May 1, Year 2, the company sold 12,000 additional shares for cash. On August 1, a 10% stock dividend was distributed. On November 1, 12,000 shares were reacquired as treasury stock. What is the weighted-average number of common shares outstanding during Year 2 and included as the denominator of the earnings per share calculation?