Bistrol Corporation uses the weighted-average method in its process costing system. This month, the beginning inventory in the first processing department consisted of 800 units. The costs and percentage completion of these units in beginning inventory were:

Cost Percent

Materials costs $ 15,700 75%

Conversion costs $ 7,700 20%

A total of 8,400 units were started and 7,500 units were transferred to the second processing department during the month. The following costs were incurred in the first processing department during the month:

Cost

Materials costs $ 186,300

Conversion costs $ 329,800

The ending inventory was 70% complete with respect to materials and 60% complete with respect to conversion costs.How many units are in ending work in process inventory in the first processing department at the end of the month?

A) 7,600

B) 900

C) 1,700

D) 1,200