Given the following information: current assets = $400: fixed assets = $500; accounts payable = $100; notes payable $45; long-term debt = $455; equity = $300; sales = $450; costs $400; tax rate = 34%. TSuppose that current assets, costs, and accounts payable maintain a constant ratio to sales. If the firm is producing at 80% capacity, what is the total external financing needed if sales increase 25%? Assume the firm pays no dividends