A company projects that next year's sales will grow 15% and ROA (net income divided by the previous year's total assets) is constant at 6%, but long-term debt and equity do not change with sales automatically (except for the new retained earnings). The current year's total assets and accounts payable are $4000 and $800. Accounts payable usually grow at the same rate as sales. The company's plowback ratio is always 80%. Assuming that total assets must grow at the same speed as sales, what is next year's external financing need (round to the closest whole number and the answer could be negative)?