The most recent financial statements for Mandy Company are shown below:

Income Statement Balance Sheet

Sales $ $93,000$ Current assets $ $33,500$ Debt $ $43,800$

Costs $67,050$ Fixed assets $94,100$ Equity $83,800$

Taxable income $ $25,950$ Total $ $127,600$ Total $ $127,600$

Tax $(24\%)6,228$

Net Income $ $19,722$

Assets and costs are proportional to sales. Debt and equity are not. The company maintains a constant $30$ percent dividend payout ratio. No external equity financing is possible. What is the sustainable growth rate?