Holliday Company's inventory records show the following data: Units Unit Cost Inventory, January 1 5,000 $9.00 Purchases: June 18 4,500 8.00 November 8 3,000 7.00 A physical inventory on December 31 shows 2,000 units on hand. Holliday sells the units for $12 each. The company has an effective tax rate of 20%. Holliday uses the periodic inventory method. Under the FIFO method, the December 31 inventory is valued at a. $14,000. b. $14,500. c. $15,000. d. $18,000