9. Krein Company has a product with a selling price of $25 per unit that generates $10 in contribution margin for each unit sold. Last year the company had a profit of $20,000 and variable expenses totaling $180,000. Because of economy, Krein is considering a price reduction of $5.00 per unit. How many more units must be sold at the reduced price to earn the same profit as last year? a. 12,000 more units. c. 7,000 more units b. 10,000 more units. d. 8,000 more units