pre_text: five-year performance comparison 2013 the following graph provides an indicator of cumulative total shareholder returns for the corporation as compared to the peer group index ( described above ) , the dj trans , and the s&p 500 . the graph assumes that $ 100 was invested in the common stock of union pacific corporation and each index on december 31 , 2006 and that all dividends were reinvested . purchases of equity securities 2013 during 2011 , we repurchased 15340810 shares of our common stock at an average price of $ 96.08 . the following table presents common stock repurchases during each month for the fourth quarter of 2011 : period total number of shares purchased [a] average price paid per share total number of shares purchased as part of a publicly announced plan or program [b] maximum number of shares that may yet be purchased under the plan or program [b] .
post_text: [a] total number of shares purchased during the quarter includes approximately 30137 shares delivered or attested to upc by employees to pay stock option exercise prices , satisfy excess tax withholding obligations for stock option exercises or vesting of retention units , and pay withholding obligations for vesting of retention shares . [b] on april 1 , 2011 , our board of directors authorized the repurchase of up to 40 million shares of our common stock by march 31 , 2014 . these repurchases may be made on the open market or through other transactions . our management has sole discretion with respect to determining the timing and amount of these transactions. .
table: <i>Period</i> <i>Total Number ofSharesPurchased [a]</i> <i>AveragePrice PaidPer Share</i> <i>Total Number of SharesPurchased as Part ofaPublicly Announced Planor Program [b]</i> <i>Maximum Number ofShares That May Yet</i><i>Be Purchased Under the Planor Program [b]</i>
table: Oct. 1 through Oct. 31 379,488 87.46 371,639 31,370,427
table: Nov. 1 through Nov. 30 1,748,964 98.41 1,733,877 29,636,550
table: Dec. 1 through Dec. 31 1,787,343 100.26 1,780,142 27,856,408
table: Total 3,915,795 $98.19 3,885,658 N/A
question: Analyse this data from a financial earnings document. for all of 2011 , approximately how much was spent on stock repurchases?