1. 1. The inventory records for Radford Co. reflected the following:
      
      

      Beginning inventory @ May 1	1800 units @ $5.20
      First purchase @ May 7	1900 units @ $5.40
      Second purchase @ May 17	2100 units @ $5.50
      Third purchase @ May 23	1700 units @ $5.60
      Sales @ May 31	5700 units @ $7.10

      What is the amount of cost of goods sold assuming the LIFO cost flow method?

      		$31,330
      		$31,920
      		$30,780
      		$29,640