MiCo opens for business in 20X3 and uses the periodic method and LIFO costing. On December 31, 20X3, there are 900 units of merchandise in MiCo's inventory @ $11. MiCo's 20X4 merchandise purchases are as follows: February 4 1,200 @ $14 March 10 2,000 @ $15 July 7 3,300 @ $18 October 21 4,200 @ $20 If MiCo's December 31, 20X4 physical count shows 1,500 units in ending inventory, then ending inventory on MiCo's balance sheet will be ... a. $21,300 b. $30,000 c. $18,300 d. $21,900