Flexible Budget for Selling and Administrative Expenses for a Service Company 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. (Use Exhibit 5 as a model.)