A firm has current assets of $1,600, net fixed assets of $6,000, accounts payable of $800, long-term debt of $2,400, equity of $4,400, sales of $7,500, costs of $5,300, and a tax rate of 35 percent. Assume costs, accounts payable, and current assets all increase at the same rate as sales. Also assume 60 percent of net income is paid out in dividends and that the firm is currently operating at 90 percent of capacity. If sales grow at 20 percent, compute the external financing need.