Alt Corporation uses the weighted-average method in its process costing system. This month, the beginning inventory in the first processing department consisted of 500 units. The costs and percentage completion of these units in beginning inventory were:

Materials cost $7,300, Percent complete 55%

Conversion cost $$2,100, percent complete 10%

A total of 9,700 units were started and 9,100 units were transferred to the second processing department during the month. The following costs were incurred in the first processing department during the month:

Materials cost $237,800 and conversion costs $376,400

The ending inventory was 85% complete with respect to materials and 75% 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