Applying the Cost of Goods Sold Model Hempstead Company. has the following data for 2019: Item Units Cost Inventory, 12/31/2018 990 $10,890 Purchases 4,510 49,610 Inventory, 12/31/2019 720 6,850 Required: 1. How many units were sold? units 2. Using the cost of goods sold model, determine the cost of goods sold