Raymond & Sons generates an average contribution margin ratio of 45% on its sales. Management estimates that by spending $3,500 more per month to rent additional facilities, the business will be able to increase operating income by $10,000 per month. Management must feel that the additional facilities will increase monthly sales volume (in dollars) by:

Multiple Choice

• $4,725.
• $30,000.
• $13,500.
• $8,775.