Problem 0-09A at-a2, b (Part Level Submission) Crane 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 5 $140 Sales Units Date July 1 July 6 July 11 July 14 July 21 July 27 $160 $350 (a1) 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 $ July 11 $ July 14 $ July 21 $ July 27