Using the following information, calculate the cost of ending inventory on December 31, 2011 using dollar-value LIFO.
Year - Ending Inventory @ Current Year Cost - Cost Index
2007 $100,000 1.00
2008 $126,000 1.05
2009 $137,500 1.10
2010 $145,000 1.25
2011 $180,000 1.20