Perpetuat invertory using uro Beginaing inventory, purchases, and sales for Jtem BB HX are as follows: assuming a perpetual inventory system and using the Last-in, fint-out (LFO) method, detemine (b) the cost of poods sold on zuly 27 and (b) the imventory on July 31. a. Cost of poods sold on July 27 b. tenventory on Xily ax