Problem $3-21$ Calculating Sustainable Growth $[$LO $3]$

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

Assets and costs are proportional to sales. The company maintains a constant $30$ percent dividend payout ratio. No external equity

financing is possible. What is the sustainable growth rate assuming no external equity and it maintains a total debt ratio?

Note: Do not round intermediate calculations and enter your answer as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.$