Suppose that the daily demand for an item has mean 80 and standard deviation 30. The supply lead time has mean 3 days and standard deviation 1 day. You are using the base-stock policy to order the item every day. Based on the target fill rate requirement, you are setting the z score to z = 1.5. What are the average units that flow through the system in 10 days? (Don't source) 2800 2400 800 400