Omega Limited has net income of $35 million, earnings before tax of $50 million, earnings before interest and tax of $60 million, gross profit of $80 million, sales of $300 million, assets of $400 million, current liabilities of $40 million, shareholders equity of $120 million, dividends of $15 million, shares outstanding of 100 and share price of $2 per share. Calculate sustainable growth rate ratio ratio?