Weygandt, Accounting Principles, 12e Help I System Announcements ment PRINTER VERSION BACK Problem 6-9A Wittmann Co. began operations on July 1. sales. It uses a perpetual inventory system. During July, the company had the following purchases and Purchases Date uly 1 July 6 July 11 July 14 July 21 July 27 75 $122 45 105 $136 75 120 $147 75 Calculate the average cost per unit at July 1, 6, 11, 14, 21 & 27. (Round answers to 2 decimal places, e.g. s105.50.) Average cost for each unit July 1 July 6