40. MC.06.111 Excellent Manufacturing uses a process cost system to manufacture sensors for the security industry. The following information pertains to operations for the month of March Units 12,600 115,500 92,400 35,700 Beginning work-in-process inventory, March 1 Started production during March Completed production during March Ending work-in-process inventory, March 31 The beginning inventory was 65% complete for materials and 25% complete for conversion costs. The ending inventory was 80% complete for materials and 45% complete for conversion costs Costs pertaining to the month of March are as follows: Beginning inventory costs: materials = $46,200, conversion cost-$32,025 Costs incurred during March: materials used =617,400; conversion cost = 655,200 Which of the following is the unit cost of materials calculated using the weighted average method? (Note: Round answer to two decimal places.) a.$5.49 b.$5.00 C.$4.50 d.$5.46