The inventory records for Radford Co. reflected the following 300 units@$2.20 400 units @$2.4 600 units @ $2 200 units $2.6 1200 units $4.10 Beginning inventory @ May 1 rst purchase May 7 Second purchase May 17 Sales @ May 31 What is the amount of cost of goods sold assuming the LIFO cost flow method? O $2640 O $2880 O $3120 O $2980