Novak Company's inventory records show the following data for the month of September: Units Unit Cost Inventory. September 1 110 $2.80 Purchases: September 8 450 3.40 September 18 280 3.70 A physical inventory on September 30 shows 140 units on hand. Calculate the value of ending inventory and cost of goods sold if the company uses FIFO inventory costing and a periodic inventory system. Ending inventory $ Cost of goods sold $