Sunland Company 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 12 $64 July 6 10 July 11 8 $69 July 14 8 July 21 10 $74 July 27 (21) Calculate average cost for each unit. (For calculation and answers purpose round unit costs to 2 decimal places, s. 15.25.) July 1 $ July 6 $ July 11 $ July 14 $ July 21 $ July 27 $