If unit costs remain unchanged and sales volume and sales price per unit both increase from the preceding period when operating profits were eamed, operating profits must A. Increase under the absorption costing method. B. Increase under the variable costing method. C. Decrease under the absorption costing method. D. Decrease under the variable costing method. If unit costs remain unchanged and sales volume and sales price per unit both increase from the preceding period when operating profits were eamed, operating profits must A. Increase under the absorption costing method. B. Increase under the variable costing method. C. Decrease under the absorption costing method. D. Decrease under the variable costing method