The following lots of Commodity Z were available for sale during the year. Beginning inventory First purchase Second purchase 7 units at $48 19 units at $52 23 units at $58 Third purchase 18 units at $61 The firm uses the periodic inventory system, and there are 27 units of the commodity on hand at the end of the year. What is the ending inventory balance of Commodity Z using FIFO? Oa. $3,756 Ob. $1,620 Oc. $1.296 Od. $3,729