单选题 An analyst gathers the following information about a company's common stock: · 1 January 2009 180000 shares outstanding · 1 June 2009 60000 shares issued · 1 August 2009 2-for-1 stock split · 31 December 2009 480000 shares outstanding To calculate earnings per share for 2009, the company's weighted average number of shares outstanding is closest: