Stephanie Wong runs a small company and she wants to perform an inventory analysis on one of her most popular products. Annual demand for this product is 5,000 units; holding cost is $40 per unit per year, fixed ordering costs for her company typically run $60 per order; and the average lead time is 10 days. Assume 365 working days per year. (a) What is the economic order quantity? [3 pts] (b) What is the average inventory level? [2 pts] (c) What is the optimal number of orders per year? [2 pts] (d) What is the optimal number of working days between two consecutive orders (i.e., the reorder interval)? [3 pts] (e) What is the total annual inventory cost (holding cost + fixed ordering cost)? [2 pts]