Exercise 7H: The Swedish company Rossons Sport sells skis end ski-equipment. They purchase skis at a price of $260 per pair and sales price is $420. Skis not sold this season can be sold early next season at a discounted price, $200. In addition, they estimate the stock holding cost between seasons to be $25 per pair of skis. Past sales shows that demand per season is normal distributed with a mean of 439 pairs and a standard deviation of 56 . a. Calculate the shortage and overage cost per pair b. What is the service level? c. Advice Rossons Sport how many pair of skis they should purchase