11. There is a product that sells 600 pieces a week. Looking at the past records, it can be seen that demand follows the following distribution. demand Cumulative probability (%) 400/week 100- 450- 90- 500- 79- 550- 64- 600- 50- 650- 22 700- 84 750- 800- 0 The maintenance cost of one product for one year is 1,300 won. The order cost is 72,000 won. Delivery period is constant for one week. Inventory depletion twice a year is allowed. Find order quantities and safety stocks to help reduce costs. 3- 11. There is a product that sells 600 pieces a week. Looking at the past records, it can be seen that demand follows the following distribution. demand Cumulative probability (%) 400/week 100- 450- 90- 500- 79- 550- 64- 600- 50- 650- 22 700- 84 750- 800- 0 The maintenance cost of one product for one year is 1,300 won. The order cost is 72,000 won. Delivery period is constant for one week. Inventory depletion twice a year is allowed. Find order quantities and safety stocks to help reduce costs. 3