relevant range of production is 7,500 units to 12,500 units. When it produces and sells 10,000 units, its unit cost are as follows Amount per Unit Direct Materials $6.00 Direct labor $ 3.50 Variable manufacturing overhead $ 1.50 Fixed manufacturing overhead $ 4.00 Fixed selling expense $ 3.00 Fixed administrative expense $ 2.00 Sales commissions $ 1.00 Variable administrative expense $ 0.50 If 8,000 units are sold, what is the variable cost per unit sold