Problem 6-9A (Part Level Submission) Lambert Center 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 July 6 July 11 July 14 July 21 July 27 14 $120 10 6 $128 8 $138 6 (a1) Calculate average cost for each unit. (For calculation and answers purpose round unit costs to 2 decimal places, e.g. 15.25 and ending inventory values to 0 decimal places, e.g.515.) July 1 $ July 6 s July 11 s Duly 14 s July 21 s Duly 27 s