15. Shown below is the activity for one of the products of Random Creations: January 1 balance, 80 units @ $50 $4,000 Purchases: Sales: January 18: 40 units @ $51 January 28: 40 units @ $52 January 12: 30 units January 22: 30 units January 31: 45 units Required: Compute the January 31 ending inventory and cost of goods sold for January, assuming Random Creations uses LIFO and perpetual inventory system