Nordic Industries uses a periodic inventory system. During its first month of operations, Nordic Industries purchased inventory as follows: January 3 January 12 January 20 January 25 Units 150 Unit Cost Total Cost $ 15 $ 2,250 200 20 4,000 250 20 5,000 300 30 9,000 900 $ 20,250 There were 100 units in ending inventory on January 31. Under the weighted average cost method, what is the cost of goods sold for January? Multiple Choice $18,000 $20,250 $3,150 $2,250