$16)$ Longboard Company has a process costing system. All materials are introduced at the beginning of the process in Department One. The following information is available for the month of January:

Units

Work in process, July $1(40\%$ complete for conversion$)300$

Started $1,500$

Completed and transferred to Department $21,400$

Work in process, July $31(60\%$ complete for conversion$)400$

What are the equivalent units for the month of July if the company uses the weighted$-$average method?