1 Duffy Brothers manufactures a single product using a process involving (1) mixing ingredients and (2) a subsequent packaging operation. Duffy uses a process costing system to account for the flow of costs through its production process. In Duffy's operation, the Finished Goods Inventory account is debited for: eBook Multiple Choice The cost of units transferred directly from the Mixing Department The cost of units transferred directly from the Packaging Department The cost of units transferred directly from both the Mixing Department and the Packaging Department The cost of the units sold