given the following information: current assets=$400; fixed assets=$500; accounts paypable=$100; nate payable=$45; long-term debt=$455; equity=$300; sales=$450; costs=$400; tax rate=34%. suppose 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 if sales increase 25%? assume the firm pays no dividends.