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

Income Statement Balance Sheet

Sales $ $19,400$ Current assets $ $11,800$ Debt $ $16,000$

Costs $13,200$ Fixed assets $28,350$ Equity $24,150$

Taxable income $ $6,200$ Total $ $40,150$ Total $ $40,150$

Taxes $(22\%)1,364$

Net income $ $4,836$

Assets and costs are proportional to sales. Debt and equity are not. The company maintains a constant $55$ percent dividend payout ratio. What is the sustainable growth rate?