Bebee Corporation currently produces cardboard boxes in an automated process. Expected production per month is 40,000 units, direct costs are exist0.60 per unit, and manufacturing overhead costs are exist18,000 per month. Manufacturing overhead is all fixed costs. What is the flexible budget for 20,000 and 40,000 units, respectively? A) exist21,000: exist33,000 B) exist21,000: exist42,000 C) exist30,000: exist42,000 D) None of these answers are correct