Splish Brothers Inc. 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 7 $68 July 6 July 11 $73 July 14 3 July 21 $78 July 27 3 Calculate average cost for each unit. (For calculation and answers purpose round unit costs to 3 decimal places, e.g. 15.125.) July 1 VA $ July 6 $ July 11 $ July 14 $ July 21 July 27 $