Ivanhoe Co, began operations on July 1 . It uses a perpetual inventory system. During July, the company had the following purchases and sales. (a1) Calculate the average cost per unit at July 1,6,11,14,21&27. (Round intermediate calculations to O decimal ploces and final answers to 3 decimal places, es. $105.501. Determine the ending inventory under a perpetual inventory system using (1) FIFO, (2) moving-average cost, and (3) LIFO. (Round average-cost per unit to 3 decimal places, eg. 12.520 and final answer to 0 decimal places, e. .1,250. ) eTextbook and Media Attempts: 0 of 5 used (b) Which costing method produces the highest ending imventory