4. Charlassier Corporation manufactures and sells laptop computers and uses standard costing. For the month of September there was no beginning inventory, there were 3,000 units produced and 2,500 units sold. The manufacturing variable cost per unit is $385 and the variable operating cost per unit was $312.50. The fixed manufacturing cost is $450,000 and the fixed operating cost is $75,000. The selling price per unit is $925. Required: Prepare the income statement for Charlassier Corporation for September under variable costing.