Which of the following statements describes an element of process costing? OA. Total units accounted for equals the sum of equivalent units in ending work in process and equivalent units completed and transferred out. B. All the above describe an element of process costing systems. OC. For current period calculations, the percentage of completion for units in beginning work in process is used to calculate equivalent units under the weighted average method. D. Total conversion costs to account for includes all direct labor and manufacturing overhead costs included in beginning inventory and added to production during the period. OE. The initial cost object is a job.