Williamson, Inc.'s most recent financial statements are shown here (assuming no income taxes):

Statement of income				Balance sheet
Sales	ps	7,400		Assets	ps	19,200		Debt	ps	6,100
Costs		4,510						Equity		13,100
Lingresos grandchildren	ps	2,890		Total	ps	19,200		Total	ps	19,200

Assets and costs are proportional to sales. Debt and equity are not. Dividends are not paid. Next year's sales are projected at $8,954.

What is the external financing necessary?