The inventory records for Radford Co. reflected the following

Beginning inventory @ May 1 1,000 units @ $ 3.60

First purchase @ May 7 1,100 units @ $ 3.80

second purchase @ May 17 1,300 units @ $ 3.90

Third purchase @ May 23 900 units @ $ 4.00

Sales @ May 31 3,300 units @ $ 5.50

Determine the amount of cost of goods sold assuming the LIFO cost flow method.