Barredo corporation's relevant range of activity is 3,000 units to 7,000 units. When it produces and sells 5,000 units, its average costs per unit are as follows: average cost per unit direct materials $ 6. 60 direct labor $ 3. 65 variable manufacturing overhead $ 1. 65 fixed manufacturing overhead $ 2. 80 fixed selling expense $ 0. 70 fixed administrative expense $ 0. 40 sales commissions $ 0. 50 variable administrative expense $ 0. 45 if 4,000 units are sold, the total variable cost is closest to:.