The Lakeside Company uses a weighted-average process costing system. The following data are available: Beginning inventory -0- Units started in production 21,000 Units finished during the period 16,500 Units in process at the end of the period (complete as to materials, complete as to labor and overhead) Cost of materials used Labor and overhead costs 4,500 $41,000 $43,710 Total cost of the 16,500 units finished is: Multiple Choice $75,411. $78,121. $73.134. $84,747