六：Nanjing Corporation purchased from its shareholders 5,000 shares of its own previously issued shares for $250,000. It later resold 2,000 shares for $54 per share, then 2,000 more shares for $49 per share, and finally 1,000 shares for $40 per share. (8%) Instructions Prepare journal entries for the purchase of the treasury shares and the three sales of treasury shares.