Walmart Inc. uses the FIFO method for inventory valuation. The following information is available for the month of July:

• Beginning Inventory: 100 units at $10 per unit
• Purchases:
  • July 10: 200 units at $12 per unit
  • July 20: 150 units at $15 per unit
• Sales: 300 units Calculate the cost of goods sold, ending inventory, and gross profit.