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

Sales commissions $5\%$ of sales

Advertising expense $25\%$ of sales

Customer support expense $$1,000$ plus $8\%$ of sales

Office salaries expense $$15,000$ per month

Miscellaneous administrative expense $$1,500$ plus $5\%$ of sales

Research and development expense $$5,000$ per month

Prepare a flexible selling and administrative expenses budget for July for sales volumes of $$300,000,$ $$400,000,$ and $$500,000.($Use chart$)$