43. The daily demand for a component assembly items is normally distributed with a mean of 90 and a standard deviation of 10 units. Further, the source of supply is dependable and maintains a constant lead time of five days. If the cost of placing the order is Rs 30 and the annual holding costs are Re 0.8 per unit, find the re-order quantity and re-order point to satisfY 80% demand of the customers who place orders during the re-order period.