A bookstore has estimated the average daily demand for a certain book is 25 with a standard deviation of 5 books. The cost of each book to the bookstore is $30. The publisher is located in the west but delivery is known for certain to be 9 days. The cost of placing an order is $15. The carrying cost to hold one book for half a year is 2% of the cost of the book. The bookstore operates 250 days per year. Keep 2 digits after decimal point in calculations. What is the z value based on a 97% service level? O A. 1.88 B. 1.65 C. 0.97 D. 1.96 E. 2.17 A bookstore has estimated the average daily demand for a certain book is 25 with a standard deviation of 5 books. The cost of each book to the bookstore is $30. The publisher is located in the west but delivery is known for certain to be 9 days. The cost of placing an order is $15. The carrying cost to hold one book for half a year is 2% of the cost of the book. The bookstore operates 250 days per year. Keep 2 digits after decimal point in calculations. What is the reorder level based on a 97% service level? Pick the best answer. A. 28 units. B. 258 units. C. 253 units. D. 225 units. be E. 33 units. GE, a turbine manufacturer, works an 18-hour day, 300 days a year. Titanium blades can be produced on its turbine blade machine TBM1 at a rate of 2.7 million units per year, and the annual demand is 1.5 million units. The blade costs $15 per unit, and carrying cost is $0.10 per day per blade because of insurance, interest, and space allocation. TBM1 costs $250 to set up for each run. Lead time requires production to begin after stock drops to 500 blades. What is the optimal production quantity for TBM1? Pick the best answer. A. 7,300 units. B. 7,400 units. C. 7,500 units. D. 7,600 units. E. 7,700 units