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 Beginning work-in-process inventory, March 1 12,600 Started production during March 115,500 Completed production during March 92,400 Ending work-in-process inventory, March 31 35,700

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 total cost of the units in ending work-in-process inventory by using the weighted average method? (Note: Round the unit direct material cost, the unit conversion cost, and the answer to two decimal places.)

a.$256,962.50

b.$253,960.70

c.$250,670.60

d.$258,646.50