the harvard co-op orders sweatshirts with the harvard university emblem on them which costs them $50 each. during a typical month, 900 sweatshirts are sold (this includes all styles and sizes ordered from a particular supplier). it costs $25 to place an order (for multiple sizes and styles) and 25 percent to carry sweatshirts in inventory for a year. the co-op has discovered that it should establish a safety stock for its sweatshirts. it wants to use a reorder point system with a two-week lead time. the demand over a two-week interval has an average of 450 units. the standard deviation for a two week period is 250 units. a. what reorder point should the co-op establish to ensure a 95 percent service level? (round answer up to the nearest integer.) b. what reorder point should be established to ensure that no more than one stockout occurs in the course of a year? (round answer up to the nearest integer.)