The number of orders in the inventory system (called A) is total demand (called D) divided by order size per replenishment (called S) or A = D/S. D follows a normal distribution with a mean of 100,000 and a standard deviation of 5000. While S is a continuous uniform distribution between 20,000 and 30,000. Generate 500 A random number and find the average. Excel Simulation. How do I go about setting up Excel for this problem? Can you help show me a excel spreadsheet example of this problem please?