Model F4X has been effectively managed in the past, according to its managers. The previous technique used the economic production quantity model, and resulted in an optimum lot size of 100. For this product, setup time is directly proportional to setup cost, and setup time is currently 40 minutes per batch. What should the set up time be in order for the lot size to fall to 50 units? 25 min 10 min 30 min 20 min 12 min