Inventory calculators

The stock decisions that repeat every week, as calculators: when to reorder (reorder point), how much buffer to hold (safety stock), how much to order at once (economic order quantity), how fast stock moves (inventory turnover), how long it lasts (days of cover), and what holding it costs (carrying cost). Each page shows the formula, a worked example, and the assumptions it rests on — crunch your own numbers and check the working.