Problem 6-09A a1-a2, b (Part Level Submission) Cullumber Co. began operations on July 1. It uses a perpetual inventory system. During July, the company had the following purchases and sales. Units Purchases Unit Cost $140 Sales Units 3 Date July 1 July 6 July 11 July 14 July 21 July 27 7 $154 6 B $165 5 (a1) 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 July 1 July 6 $ July 11 $ July 14 $ July 21 July 27 Click if you would like to Show Work for this question: Open Show Work LINK TO TEXT (a2)