"P6-9A Premier Center began operations on July 1. It uses a perpetual inventory system. Determine endim. During July, the company had the following purchases and sales. under a perpetual system. (5037,48 Instructions (a) Determine the ending inventory under a perpetual inventory system using (1) FIFO, FR (2) moving-average (round unit cost to three decimal places), and (3) L.IFO. (b) Which costing method produces the highest ending inventory valuation