A production department's output for the most recent month consisted of $10,500$ units completed and transferred to the next stage of production and $10,500$ units in ending Work in Process inventory. The units in ending Work in Process inventory were $60\%$ complete with respect to both direct materials and conversion costs. There were $1,100$ units in beginning Work in Process inventory, and they were $80\%$ complete with respect to both direct materials and conversion costs. Calculate the equivalent units of production for the month, assuming the company uses the weighted average method.