accounting: weighted average cost per unit

You have the following information for Windsor, Inc. for the month ended October 31, 2017. Windsor, Inc. uses a periodic method for inventory. Date Description Units date description Unit Cost or Selling Price Oct. 1 Beginning inventory 56 $23 Oct. 9 Purchase 122 25 Oct. 11 Sale 90 34 Oct. 17 Purchase 108 26 Oct. 22 Sale 55 39 Oct. 25 Purchase 67 28 Oct. 29 Sale 113 39 Weighted-average cost per unit __________