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: add(3.4, 2.1), add(#0, 1.8), add(88.6, 195.1), add(#2, 93.0), divide(#3, #1)