Which of the following statements are true? 1. The costs attached to products that have not been sold are included in ending inventory on the balance sheet. 2. In absorption costing, nonmanufacturing costs are assigned to units of product. 3. Most countries require some form of absorption costing for external reports. O All of the statements are true. O Only statement II is true. O Statements I and Ill are true. O Only statement I is true