Tamarisk, Inc. began operations on July 1. It uses a perpetual inventory system. During July, the company had the following purchases and sales. Purchases Units Unit Cost Date Sales Units July 1 11 $70 July 6 8 July 11 7 $80 July 14 7 July 21 9 $85 July 27 8 8 (21) ) Your answer is incorrect. Calculate average cost for each unit. (For calculation and answers purpose round unit costs to 2 decimal places, eg. 15.25.) July 1 $ GA July 6 $ July 11 $ July 14 $ DODO July 21 GA $ July 27 $