. when calculating the approximate value of shares that the company may yet purchase under the 1996 authorization , the company assumed a price of $ 148.71 , $ 161.00 and $ 144.25 per share of common stock as of the end of the fiscal 2018 months ended october 27 , 2018 , november 24 , 2018 , and december 29 , 2018 , respectively . 2022 in 2017 , the board authorized the repurchase of an aggregate of up to $ 500 million of the company 2019s common stock ( 201cthe 2017 authorization 201d )