Ivanhoe 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 $145 July 6 3 July 11 7 $155 July 14 July 21 8 $166 July 27 5 (a1) Calculate the average cost per unit at July 1, 6, 11, 14, 21 & 27. (Round intermedia to 3 decimal places, eg. $105.501.) Average cost for each unit July 1 $ July 6 $ July 11 $ July 14 July 21 July 27 piculations to decimal places and final answers