Bridgeport Corp. 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 8 $70 July 6 6 July 11 3 $75 July 14 3 July 21 5 $80 July 27 3 Collapse question part (a1) Partially correct answer. Your answer is partially correct. Try again. Calculate average cost for each unit. (For calculation and answers purpose round unit costs to 2 decimal places, e.g. 15.25.)