Date January 1 January 7 January 15 January 18 January 20 January 30 Unit Price of Purchase Units Purchased Units Sold Units Balance 0 400 400 4.65 1,300 1,700 4.90 300 1,400 560 840 600 1,440 5.10 2.1 Compute the January 31 inventory value under the perpetual LIFO inventory pricing method. 2.2 Compute the cost of goods sold for the month of January under the periodic FIFO inventory pricing method