John Helms, the CEO of the ABC Group, is initiating planning for the company's operations next year, and he wants you to forecast the firm's self-supporting growth rate since the firm doesn't have any access to external funding. . The firm is operating at full capacity. Data for use in your forecast are shown as followings: last year's sales = $400, expected sales = $400, last year's accounts payable = $50, last year's notes payable = $40, last year's accruals = $40, profit margin= 5%, and retention ratio = 40%. Based on the AFN equation, what is the firm the self-supporting growth rate?