FIFO and LIFO Costs Under Perpetual Inventory System The following units of an item were available for sale during the year: Beginning inventory Sale First purchase Sale Second purchase Sale $37,000$ units @ $$4210,690$ units @ $$6533,000$ units @ $$4516,807$ units @ $$6730,000$ units @ $$4827,650$ units @ $$69$ The firm uses the perpetual inventory system, and there are $44,853$ units of the item on hand at the end of the year. a$.$ What is the total cost of the ending inventory according to FIFO? $ b$.$ What is the total cost of the ending inventory according to Lifo?