Inventory Costing Methods.Perpetual Method Using the data below, assume that Portet Corporation uses the perpetual imventory system. Calculate the value o ending inventory and cost of goods sold at year-end using the perpetual method and (a) first-in, first-out, (b) last-in, first-out, and (c) weighted-average cost method Round the cost per unit to 3 decimal places and round your final answers to the nearest dollar