In 2005, Cobb adopted the dollar-value LIFO inventory method. At that time, Cobb's ending inventory had a base-year cost and an end-of-year cost of $300,000. In 2006, the ending inventory had a $400,000 base-year cost and a $440,000 end-of-year cost. What dollar-value LIFO inventory cost would be reported in Cobb's December 31, 2006, balance sheet?