Annenbaum Corporation uses the weighted$-$average method in its process costing system. This month, the beginning inventory in the first processing department consisted of $400$ units. The costs and percentage completion of these units in beginning inventory were:

Cost Percent Complete

Materials costs $ $5,70065\%$

Conversion costs $ $6,80045\%$

A total of $6,500$ units were started and $5,900$ 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 $ $125,500$

Conversion costs $ $207,000$

The ending inventory was $50\%$ complete with respect to materials and $35\%$ complete with respect to conversion costs.

What are the equivalent units for conversion costs for the month in the first processing department?