Explain how to get Actual Shares Outstanding for October-December please

On january 1, Case Inc. had 840,000 shares of common stock issued and outstanding. Case issued a 10\% stock dividend on July 1. On October 1, Case purchased 67,200 shares of its common stock for the treasury. What is the number of shares that should be used in computing basic earnings per share for the year ended December 31 ? The number of shares for the basic EPS caiculation is x