The need for packaging raw materials for next year is 10,000 units. The goods were obtained from a supplier at a price of Rp. 10,000,- per unit, and a message fee of Rp. 1,000,000, - every time you place an order. If the cost of storing the wrapping is Rp. 2,000 per unit per year, how does the company manage its optimal inventory policy, namely the amount ordered for each purchase, the number of times the order is made, and the total inventory cost.