Terando Co. began operations on July 1.It uses a perpetual inventory system. During July, the company had the following purchases and sales. Calculate the average cost per unit at July 1, 6, 11, 14, 21 & 27. (Round answers to 3 decimal places, e.g. $105, 250.) Determine the ending inventory under a perpetual inventory system using FIFO, moving-average cost, and LIFO. (Round average-cost per unit to 3 decimal places, e.g. 12.521 and final answer to 0 decimal places, e.g. 1, 250.) Which costing method produces the highest ending inventory valuation