Digital Solutions Inc. uses flexible budgets that are based on the following data: Sales commissions Advertising expense 14% of sales 20% of sales Miscellaneous administrative expense Office salaries expense Customer support expenses Research and development expense $6,000 per month plus 12% of sales $28,000 per month $13,000 per month plus 20% of sales $32,000 per month Prepare a flexible selling and administrative expenses budget for October for sales volum model.) Digital Solutions Inc. Flexible Selling and Administrative Expenses Budget For the Month Ending October 31 Total sales Variable cost: Total variable cost $400,000 $500,000 $600,000