Question 12 (5 points) The monthly demand for power drill is 3000 units at a hardware store. (The store opens 30 days a month). After using the EOQ model, the store finds that it is optimal to place an order of 1000 units each time. Which of the following statements is true? a) The length between two consecutive orders is 10 working days b) 3 orders are placed per month c) The average inventory at the store is 500 units d) The store incurs the lowest total annual costs by ordering 1000 units each time it places an order e) All of the above