Oriole Co. began operations on July 1. It uses a perpetual inventory system. During July, the company had the following purchases and sales. Date Units Purchases Unit Cost Sales Units July 1 4 $140 July 6 3 July 11 7 $150 July 14 6 July 21 8 $161 July 27 5 (a1) 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, e.g. $105.501.) Average cost for each unit July 1 $ July 6 $ July 11 $ July 14 $ July 21 $ 10 July 27 $ eTextbook and Media