On January 1, 2015, Easy Street Co. had 50,000 shares of common stock outstanding. On April 1, the corporation issued 20,000 new shares to raise additional capital. On June 1, the corporation declared and issued a 3-for-1 stock split. On December 1, the corporation purchased on the market 15,000 of its own outstanding shares and retired them.

Compute the weighted average number of shares to be used in computing earnings per share for 2015.