The most recent financial statements for Schenkel Co. are shown here:

Income Statement				Balance Sheet
Sales	$	18,100		Current assets	$	12,200		Debt	$	16,700
Costs		13,900		Fixed assets		29,500		Equity		25,000
Taxable income	$	4,200		Total	$	41,700		Total	$	41,700
Taxes (40%)		1,680
Net income	$	2,520

Assets and costs are proportional to sales. Debt and equity are not. The company maintains a constant 25 percent dividend payout ratio. No external equity financing is possible.

What is the sustainable growth rate?