Use this information about Department S to answer the question that follow Department S had no work in process at the beginning of the period. It added 15,000 units of direct materials during the period at a cost of $120,000. During the period 11,300 units were completed, and 3,700 units were 25% completed as to labor and overhead at the end of the period. All materials are added at the beginning of the process. Direct labor was $66,015, and factory overhead was $31,785 The total cost of units completed during the period was a. $180,800 b. $151,420 c.$216,960 d. $90,400