This App helps a business understand how much Inventory to keep on hand to meet a given customer Service Level. This is important as there are costs associated with keeping goods in inventory, having goods go unused that become waste or missing out on profits by not meeting customer demand. The App uses the power of Monte Carlo simulation to see how available inventory equates to customer service levels and fill rates. The Fill Rate is the fraction of customer demand that is met through immediate stock availability, without backorders or lost sales.