The single milling machine at Stout Manufacturing was severely overloaded last year. The plant operates eight hours per day, five days per week, and 50 weeks per year. Management prefers a capacity cushion of 40 percent. Two major types of products are routed through the milling machine. The annual demand is 3000 units for product A and 2000 units for product B. The batch size is 20 units for product A and 40 units for product B. The standard processing time is 0.5 hours/unit for product A and 0.8 hours/unit for product B. The standard setup time is 2 hours for product A and 8 hours for product B. How many additional milling machines should Stout buy if the company does not resort to any short-term capacity options?