Larken has forecast sales for the next three months as follows: July $4,200$ units, August $6,800$ units, September $8,100$ units. Larken$$s policy is to have an ending inventory of $40\%$ of the next month's sales needs on hand. July $1$ inventory is projected to be $1,680$ units. Monthly manufacturing overhead is budgeted to be $$17,100$ plus $$5$ per unit produced. What is budgeted manufacturing overhead for July?