Under absorption costing, a company had the following unit costs when 9,000 units were produced. Direct labor $ 7.25 per unit Direct material $ 8.00 per unit Variable overhead $ 5.50 per unit Fixed overhead ($67,500/9,000 units) $ 7.50 per unit Total production cost $ 28.25 per unit Compute the total product cost per unit under variable costing if 30,000 units had been produced.