Crane Co. began operations on July 1. It uses a perpetual inventory system. During July, the company had the following purchases and sales. Purchases Date Units Unit Cost Sales Units July 1 4 $140 July 6 3 July 11 $150 July 14 July 21 $161 July 27 Calculate the average cost per unit at July 1, 6, 11, 14, 21 & 27. (Round intermediate calculations to O decimal places and final answers to 3 decimal places, eg. $105.501.) Average cost for each unit July 1 $ July 6 July 11 $ July 14 $ July 21 July $ 27 $ 22