Ruby-Star Incorporated is considering two different vendors for one of its top-selling products which has an average weekly demand of 100 units and is valued at $100 per unit. Inbound shipments from vendor 1 will average 390 units with an average lead time (including ordering delays and transit time) of 4 weeks. Inbound shipments from vendor 2 will average 450 units with an average lead time of 3 weeks. Ruby-Star operates 52 weeks per year: it carries a 4-week supply of inventory as safety stock and no anticipation inventory