The recent financial statement for Mosaman

Income Statement		Balance Sheet
Sales	153,250	Current Assets	10,400	Long-term Debt	17,500
Costs	9,480	Fixed Assets	28,750	Equity	21,650
Taxable Income	3,770
Taxes (34%)	1,508	Total	39,150	Total	39,150
Net Income	2,262

Assets and costs are proportional to sales. Debt and equity are not. The company maintains a constant 30% dividend payout ratio. No external equity financing is possible.

What is the maximum growth rate that can be achieved without the need for external finance (the internal rate of growth)?

What is the growth rate which will enable the company to maintain its debt/equity ratio (the sustainable growth rate)?