A production department's output for the most recent month consisted of $9,300$ units completed and transferred to the next stage of production and $6,300$ units in ending Work in Process inventory. The units in ending Work in Process inventory were $50\%$ 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.

Multiple Choice

$10,950$ units.

$6,150$ units.

$15,600$ units.