Weatherford Industries Inc. has the following ratios: A*/S0 = 1.6; L*/S0 = 0.4; profit margin = 0.10; and dividend payout ratio = 0.45, or 45 percent. Sales last year were $100 million. Assuming that these ratios will remain constant, use the AFN formula to determine the maximum growth rate Weatherford can achieve without having to employ non spontaneous external funds.