Space Walk Corporation reported the following stockholders equity data (all dollars in millions except par value per share):

Space Walk earned net income of $2,980 during 2010. For each account except Retained Earnings, one transaction explains the change from the December 31, 2009, balance to the December 31, 2010, balance. Two transactions affected Retained Earnings. Give a full explanation, including the dollar amount, for the change in eachaccount.

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December 31, 2010 2009 609 740 889 Preferred stock.... Common stock, S1 par value. Additional paid-in capit.1,514 1,482 Retained earnings.20, 19,100 Treasury stock, common(2,777) (2,600) 905