Ending inventory assuming LIFO in a periodic inventory system would be: $3,400. $3,500. $3,560. $3,600. The ending inventory assuming LIFO in a perpetual inventory system would be: $3,400. $3,500. $3,560. $3,600. The ending inventory under a periodic inventory system assuming average cost is: $3,502. $3,572. $3,598. $3,607. During periods when costs are rising and inventory quantities are stable, ending inventory will be: Higher under LIFO than FIFO. Lower under average cost than LIFO. Higher under average cost than FIFO. Higher under FIFO than LIFO