On December 31, 2010, Courtney Company had LIFO ending inventory consisting of 800 units with a LIFO cost of $15 per unit. During the first quarter of 2011, Courtney sold 1,400 units. As of March 31, 2011, the inventory of Courtney is 650 units, and the current purchase price of inventory is $38 per unit. The reduction in the level of inventory is temporary, and Courtney fully expects inventory levels to be at or above 800 units by December 31, 2011. The recorded cost of goods sold for Courtney for the first quarter of 2011 is $49,750 [(1,250 × $38) + (150 × $15)]. What adjusting entry, if any, should Courtney make on March 31, 2011, to correctly apply LIFO to the reporting of quarterly results?