A company's relevant range of production is 10,000 to 15,000 units. When it produces and sells 12,000 units, its unit costs are as follows: Amount per Unit Direct materials $ 7.00 Direct labor $ 4.00 Variable manufacturing overhead $ 1.50 Fixed manufacturing overhead $ 5.00 Fixed selling expense $ 3.50 Fixed administrative expense $ 2.00 Sales commissions $ 1.00 Variable administrative expense $ 0.50 What is the total amount of variable cost incurred if the company produces and sells 10,500 units?