> ## Documentation Index > Fetch the complete documentation index at: https://docs.bumara.com/llms.txt > Use this file to discover all available pages before exploring further. # Inventory overview > Tracking stock in Bumara — items, locations, movements, counts, the till, and what your stock is worth. Inventory tracks what you hold, where it is, and what it is worth. Every change to stock is recorded as a movement, so you can always explain how a quantity got to where it is. ## The core idea Stock quantities are never edited directly. You cannot type a new number into a balance. Instead you record an **operation** — an adjustment, a transfer, a count, a sale — and the balance changes as a result. This means every quantity has a history. When a figure is wrong, you can see exactly which operation caused it and who did it. ## What is here What you stock — names, codes, units, reorder levels and barcodes. Increase or decrease stock with a documented reason. Move stock between locations. Count what is physically there and post the difference. Sell over the counter and deduct stock as you go. Barcode and camera scanning for sales and counts. Lay-by sales, operating expenses and money out of the till. Stock value, low stock, movements and trends. ## The four core operations | Operation | Use it when | Effect | | -------------- | ---------------------------------------------------- | --------------------------------------------- | | **Adjustment** | Stock changed for a reason outside normal trading | Increases or decreases at one location | | **Transfer** | Stock moves between your own locations | Decreases at source, increases at destination | | **Count** | You have physically counted and the system disagrees | Corrects the balance to what you counted | | **Cash sale** | You sold over the counter | Decreases stock and records the sale | ## Draft, then post Every operation follows the same pattern: Add your lines. No stock has moved. You can edit or delete freely. Right items, right quantities, right location. Stock movements are written and balances update. This is the moment it becomes real. A posted operation cannot be edited. If it is wrong, void it — which creates reversing movements and leaves both records visible. Posting is the point of no return. A posted operation can be voided but never edited, and the void is itself a permanent record. Check drafts before posting. ## Negative stock By default Bumara blocks any operation that would take a balance below zero. If you try to sell or transfer more than you have, the operation is refused and tells you which item is short. This is usually right. A negative balance means your records have lost touch with reality, and carrying on makes it worse. An administrator can override the block where genuinely necessary — typically when goods have physically been received but not yet entered. Overrides require a reason and are recorded. ## Locations Stock is held at locations — a main store, a shop, a warehouse, a vehicle. Every quantity is per item **and** per location. Your first location becomes the default. Users can be assigned to specific locations, and their dashboards then show only the stock they are responsible for. ## Units of measure Bumara includes standard units — each, kilogram, litre, box and others. You can add your own, and define conversions between them, such as one box equals twelve each. Set the right unit on each item at the start. Changing it later, once movements exist against it, is disruptive. ## What links to invoicing Products in [Invoicing](/invoicing/products-and-prices) can link to inventory items by their code. When linked, selling the product moves the stock. Keep the codes consistent between the two, and the link works without further thought. ## Low stock Each item can carry a reorder level. When a balance falls to or below it, Bumara flags it as low stock and can notify you. Set reorder levels on the items that matter — the ones you cannot trade without. Setting them on everything produces noise you will start ignoring. ## Where to start See [Setting up inventory](/inventory/setting-up). Names, codes, units, reorder levels. See [Items](/inventory/items). An adjustment with the reason "opening balance", recording what you currently hold. Sales, adjustments and transfers as you go. Monthly or quarterly, so your records stay honest. See [Stock counts](/inventory/stock-counts).