Dynozz Corporation currently produces cardboard boxes in an automated process. Expected production per month is 15,000 units, direct material costs are $0.50 per unit, and manufacturing overhead costs are $15,000 per month. Manufacturing overhead is all fixed costs. What are the flexible budget for 10,000 and 15,000 units, respectively?

A. $15,000; $22,500

B. $15,000; $17,500

C. $20,000; $22,500

D. $20,000; $17,500