Digital Solutions Inc. uses flexible budgets that are based on the following data:

Sales commissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8% of sales

Advertising expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15% of sales

Miscellaneous administrative expense . . . . . . . . . . . . . . . . . . . . . . . . $10,000 per month plus 4% of sales

Office salaries expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $50,000 per month

Customer support expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $20,000 per month plus 30% of sales

Research and development expense . . . . . . . . . . . . . . . . . . . . . . . . . $75,000 per month

Prepare a flexible selling and administrative expenses budget for October for sales volumes of $500,000, $750,000, and $1,000,000.