PT Angin Tongi uses 12.000 component X every month for producing education toy. The cost of placing an order is Rp73.500. The carrying cost per unit is Rp7.500. PT Angin Tongi uses an average of 600 component X per day. It takes six days to place and receive an order. Required: 1. Calculate the EOQ for component X. (4%) 2. Calculate the annual ordering costs and carrying costs for component X. (4%) 3. If maximum lead time is ten days, calculate the safety stock and reorder point for component X. (4%) 4. Suppose inventory manager at PT Angin Tongi have to choose between MRP and JIT system for managing inventory of PT Angin Tongi. The followings are some characteristics of its Product Y. The demand of Product Y is uncertain but company has long-term agreement with reliable supplier to order any time. It's carrying cost is high. PT Angin Tongi has limited warehouse to keep its raw materials and finished goods. Which method will you recommend to PT Angin Tongi? Give your reasons to justify your choice. (3%)