Agee Company uses a process-costing system for its single product. Material A is added at the beginning of the process; in contrast, material B is added when the units are 50% complete. The firm's ending work-in-process inventory consists of 5,200 units that are 75% complete. Which of the following correctly expresses the equivalent units of production with respect to materials A and B in the ending work-in-process inventory? Multiple Choice A, 5,200; B, 3,900. A, 5,200; B, 5,200. A, 3,900; B, 0. A, 5,200; B, 0. A, 3,900; B, 3,900