Pimrypie Cosmetic Itd. orders watermelon serum 400,000 units from a cosmetic factory. For producing the product the factory must charge the total cost of order in each time is 16,000 baht per time, carrying cost per unit is 2 baht and safety stock is set for 1000 units

a. ) How many products should it order?

b. ) How many times should it be ordered in the year? And the maximum level of this product in the warehouse?

If he puts in 155,500,000 baht into the investment of corporate bond maturity 4 years is 3.6 percent, what is the future value of his capital for the next 4 years without withdrawing?