westrock company notes to consolidated financial statements 2014 ( continued ) note 20 . stockholders 2019 equity capitalization our capital stock consists solely of common stock . holders of our common stock are entitled to one vote per share . our amended and restated certificate of incorporation also authorizes preferred stock , of which no shares have been issued . the terms and provisions of such shares will be determined by our board of directors upon any issuance of such shares in accordance with our certificate of incorporation . stock repurchase plan in july 2015 , our board of directors authorized a repurchase program of up to 40.0 million shares of our common stock , representing approximately 15% ( 15 % ) of our outstanding common stock as of july 1 , 2015 . the shares of our common stock may be repurchased over an indefinite period of time at the discretion of management . in fiscal 2019 , we repurchased approximately 2.1 million shares of our common stock for an aggregate cost of $ 88.6 million . in fiscal 2018 , we repurchased approximately 3.4 million shares of our common stock for an aggregate cost of $ 195.1 million . in fiscal 2017 , we repurchased approximately 1.8 million shares of our common stock for an aggregate cost of $ 93.0 million . as of september 30 , 2019 , we had remaining authorization under the repurchase program authorized in july 2015 to purchase approximately 19.1 million shares of our common stock . note 21 . share-based compensation share-based compensation plans at our annual meeting of stockholders held on february 2 , 2016 , our stockholders approved the westrock company 2016 incentive stock plan . the 2016 incentive stock plan was amended and restated on february 2 , 2018 ( the 201camended and restated 2016 incentive stock plan 201d ) . the amended and restated 2016 incentive stock plan allows for the granting of options , restricted stock , sars and restricted stock units to certain key employees and directors . the table below shows the approximate number of shares : available for issuance , available for future grant , to be issued if restricted awards granted with a performance condition recorded at target achieve the maximum award , and if new grants pursuant to the plan are expected to be issued , each as adjusted as necessary for corporate actions ( in millions ) . shares available issuance shares available for future shares to be issued if performance is achieved at maximum expect to awards amended and restated 2016 incentive stock plan ( 1 ) 11.7 5.1 2.3 yes 2004 incentive stock plan ( 1 ) ( 2 ) 15.8 3.1 0.0 no 2005 performance incentive plan ( 1 ) ( 2 ) 12.8 9.0 0.0 no rocktenn ( sscc ) equity inventive plan ( 1 ) ( 3 ) 7.9 5.9 0.0 no ( 1 ) as part of the separation , equity-based incentive awards were generally adjusted to maintain the intrinsic value of awards immediately prior to the separation . the number of unvested restricted stock awards and unexercised stock options and sars at the time of the separation were increased by an exchange factor of approximately 1.12 . in addition , the exercise price of unexercised stock options and sars at the time of the separation was converted to decrease the exercise price by an exchange factor of approximately 1.12 . ( 2 ) in connection with the combination , westrock assumed all rocktenn and mwv equity incentive plans . we issued awards to certain key employees and our directors pursuant to our rocktenn 2004 incentive stock plan , as amended , and our mwv 2005 performance incentive plan , as amended . the awards were converted into westrock awards using the conversion factor as described in the business combination agreement . ( 3 ) in connection with the smurfit-stone acquisition , we assumed the smurfit-stone equity incentive plan , which was renamed the rock-tenn company ( sscc ) equity incentive plan . the awards were converted into shares of rocktenn common stock , options and restricted stock units , as applicable , using the conversion factor as described in the merger agreement. .

Table: shares available for issuance shares available for future grant shares to be issued if performance is achieved at maximum expect to make new awards amended and restated 2016 incentive stock plan ( 1 ) 11.7 5.1 2.3 yes 2004 incentive stock plan ( 1 ) ( 2 ) 15.8 3.1 0.0 no 2005 performance incentive plan ( 1 ) ( 2 ) 12.8 9.0 0.0 no rocktenn ( sscc ) equity inventive plan ( 1 ) ( 3 ) 7.9 5.9 0.0 no

westrock company notes to consolidated financial statements 2014 ( continued ) note 20 . stockholders 2019 equity capitalization our capital stock consists solely of common stock . holders of our common stock are entitled to one vote per share . our amended and restated certificate of incorporation also authorizes preferred stock , of which no shares have been issued . the terms and provisions of such shares will be determined by our board of directors upon any issuance of such shares in accordance with our certificate of incorporation . stock repurchase plan in july 2015 , our board of directors authorized a repurchase program of up to 40.0 million shares of our common stock , representing approximately 15% ( 15 % ) of our outstanding common stock as of july 1 , 2015 . the shares of our common stock may be repurchased over an indefinite period of time at the discretion of management . in fiscal 2019 , we repurchased approximately 2.1 million shares of our common stock for an aggregate cost of $ 88.6 million . in fiscal 2018 , we repurchased approximately 3.4 million shares of our common stock for an aggregate cost of $ 195.1 million . in fiscal 2017 , we repurchased approximately 1.8 million shares of our common stock for an aggregate cost of $ 93.0 million . as of september 30 , 2019 , we had remaining authorization under the repurchase program authorized in july 2015 to purchase approximately 19.1 million shares of our common stock . note 21 . share-based compensation share-based compensation plans at our annual meeting of stockholders held on february 2 , 2016 , our stockholders approved the westrock company 2016 incentive stock plan . the 2016 incentive stock plan was amended and restated on february 2 , 2018 ( the 201camended and restated 2016 incentive stock plan 201d ) . the amended and restated 2016 incentive stock plan allows for the granting of options , restricted stock , sars and restricted stock units to certain key employees and directors . the table below shows the approximate number of shares : available for issuance , available for future grant , to be issued if restricted awards granted with a performance condition recorded at target achieve the maximum award , and if new grants pursuant to the plan are expected to be issued , each as adjusted as necessary for corporate actions ( in millions ) . shares available issuance shares available for future shares to be issued if performance is achieved at maximum expect to awards amended and restated 2016 incentive stock plan ( 1 ) 11.7 5.1 2.3 yes 2004 incentive stock plan ( 1 ) ( 2 ) 15.8 3.1 0.0 no 2005 performance incentive plan ( 1 ) ( 2 ) 12.8 9.0 0.0 no rocktenn ( sscc ) equity inventive plan ( 1 ) ( 3 ) 7.9 5.9 0.0 no ( 1 ) as part of the separation , equity-based incentive awards were generally adjusted to maintain the intrinsic value of awards immediately prior to the separation . the number of unvested restricted stock awards and unexercised stock options and sars at the time of the separation were increased by an exchange factor of approximately 1.12 . in addition , the exercise price of unexercised stock options and sars at the time of the separation was converted to decrease the exercise price by an exchange factor of approximately 1.12 . ( 2 ) in connection with the combination , westrock assumed all rocktenn and mwv equity incentive plans . we issued awards to certain key employees and our directors pursuant to our rocktenn 2004 incentive stock plan , as amended , and our mwv 2005 performance incentive plan , as amended . the awards were converted into westrock awards using the conversion factor as described in the business combination agreement . ( 3 ) in connection with the smurfit-stone acquisition , we assumed the smurfit-stone equity incentive plan , which was renamed the rock-tenn company ( sscc ) equity incentive plan . the awards were converted into shares of rocktenn common stock , options and restricted stock units , as applicable , using the conversion factor as described in the merger agreement. .

Question: what was the weighted average total of the aggregate cost of the per share repurchased from 2017 to 2019
Answer: 51.6
Calculation: divide(add(add(88.6, 195.1), 93.0), add(add(3.4, 2.1), 1.8))