You bought it because it smelled good in the supplier's showroom. Your customers have a different opinion, or no opinion at all — they walk past it every time. It is sitting there now. Taking up shelf space. Tying up capital. Every week that passes without a sale is a week that money is not moving. In perfume retail, slow stock is the most expensive problem you have, because the margins on fast stock can look healthy while the slow bottles quietly drain your cash position. The hard part is knowing which bottles are slow. If you are running on memory, you know the obvious ones — the bottle you have been mentally willing a customer to buy for three months. But the ones that have been on the shelf for six weeks? Eight weeks? You probably cannot name them without looking. A system that tracks stock age tells you something a notebook cannot: not just what sold, but what did not. A 30-day window of zero sales on a product that has been in stock for 45 days is information. It tells you to move it — discount it, feature it, bundle it, return it to the supplier if they will take it — before it becomes a four-month problem. Perfume retail has one more layer that makes this harder. Slow stock looks fine. It does not expire visibly. It does not take up the way a rack of unsold clothing does. A slow perfume looks exactly like a perfume waiting to be bought. The visual signal is absent, which means you need a data signal instead. The shops that manage stock age well do one thing differently from the ones that do not. They look at what has not moved, not just what has. The weekly restock conversation in those shops is not only about what to order. It includes what to clear. That second conversation is only possible if you have the data to have it.