Chae Corporation uses the weighted-average method in its process costing system. This month the beginning inventory in the first processing department consisted of 660 units. The costs and percentage completion of these units in beginning inventory were: Cost Percent Complete Materials costs $7500 65% Conversion costs $6500 30% A total of 9700 units were started and 8300 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 costs $137500 Conversion costs $323500 The ending inventory was 70% complete with respect to materials and 65% 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?