Candy Goods Co. implements a weighted-average method for process costing, and all materials are added at the start of production. What is the correct way to calculate costs of direct materials in this case?

Costs incurred during the period + cost of the ending work in process inventory

Cost of the beginning work in process inventory + cost of ending work in process inventory

Cost of units transferred out + cost of beginning work in process inventory

Costs incurred during the period + cost of the beginning work in process inventory