Beginning inventory May 1 First purchase May 7 second purchase e May 17 Third purchase May 23 Sales May 31 400 units$2.40 500 units e $2.60 700 units $2.70 300 units $2.80 1,500 units $4.30 Determine the amount of cost of goods sold assuming the LIFO cost flow method. Multiple Choice $3,600 $4,200 $3,900 $4,030