The Shorthorn Company adopted the dollar-value LIFO method on January 1989. Inventory data for the Company is given below. Required: Date 12/31/88 12/31/89 12/31/90 12/31/91 Ending Inventory at Current Costs $16,000 24, 200 18,000 30,000 Cost Index 100 110 120 125 Determine the cost of the inventory at the end of each year.