Fuller Enterprises uses flexible budgets that are based on the following data:

Sales commissions ...................................................6% of sales

Advertising expense ...................................................20% of sales

Customer support expense..........................$2,000 plus 16% of sales

Office salaries expense......................................$30,000 per month

Miscellaneous administrative expense..............$3,000 plus 5% of sales

Research and development expense .....................$10,000 per month

Prepare a flexible selling and administrative expenses budget for July for sales volumes of $600,000, $800,000, and $1,000,000. (Use Exhibit 5 as a model.)