Rico needs 719 lbs of roast beef per week on average to make sandwiches for his cafe. The supplier charges a $13 delivery fee per order (which is independent of the order size) and $10.33 per lb. Ricos annual holding cost is 25%. Assume 52 weeks per year. If Rico wants to minimize inventory holding and ordering costs, how much roast beef should he purchase with each order (in lbs)? (report your answer as an integer and show work in Excel)