The Lakeside Company uses a weighted-average process costing system. The following data are available: Beginning inventory -0- Units started in production 20,000 Units finished during the period 16,000 Units in process at the end of the period (complete as to materials, 4,000 complete as to labor and overhead) Cost of materials used $35,200 Labor and overhead costs $37,400 Total cost of the 4,000 units of the ending inventory: Multiple Choice $8,910. $14,520. $15,840. $9.240.