Table 1 shows the average weekly demand with total 37,920 units shipped within two months. All orders are being shipped to customers using air-freight that charges RM250 +0.05x, where x is the number of total weight being shipped by air-freight. Each of the product is weight 0.6 kilogram. The company has assigned you as a consultant to advice to top management by choosing the right response day and cost advantages. Suggest to company the suitable response time with the right cost advantages in order to compete in market and satisfy customer satisfaction. Provide all the necessary analysis to prove to top management with your justification. Table 1: Average demand weekly for two months Week Demand (unit) 1 4,258 2 6,500 3 5,700 4 3,750 5 4,444 6 3,285 7 2,437 8 7,546