On Secember $31,2019,$ Alpha Company had $300,000$ shares of common stock issued and outstanding. Alpha issued a $5\%$ stock dividend on June $30,2020.$ On September $30,2020,40,000$ shares of common stock were reacquired as treasury stock. What's the appropriate number of shares to be used in the basic earnings per share computation for $2020.$ A$.305,000,$ B$.307,500,$ C$.267,500,$ or D$.315,000.$