Concord Company's inventory records show the following data: Units Unit Cost Inventory: Purchases: January 1 June 18 12000 $8.80 8100 8.00 November 4800 6.00 A physical inventory on December 31 shows 3600 units on hand. Concord selis the units for $12 each. The company has an effective tax rate of 20%. Concord uses the periodic inventory method. The weighted-average cost per unit is $7.85 $7.70. $8.00 $8.30