Problem 6-9A (Part Level Submission) Wittmann Co. began operations on July 1. It uses a perpetual inventory system. During July, the company had the following purchases and sales Purchases Date July 1 July 6 July 11 July 14 July 21 July 27 onitsUnit Cost Sales Units 205 $122 123 287 $136 205 328 $147 205 (a1) | Your answer is incorrect. Try again. Calculate the average cost per unit at July 1,6,11,14,21&27. (Round answers to 2 decimal places, e.g. $105.50.) Average cost for each unit July1 July 6 July 11 July 14 July 21 July 27