The following lots of a particular commodity were available for sale during the year Beginning inventory 7 units at $50.00 First purchase Second purchase 26 units at $26.00 Third purchase The firm uses the periodic system and there are 24 units of the commodity on hand at the end of the year. What is the amount of inventory at the end of the year according t average cost method? Select the correct answer 18 units at $53.00 18 units at $64.00 $1,200.00 $1,089 39 $1,251.00 $1,308.00