> For the complete documentation index, see [llms.txt](https://docs.simplespa.net/simplespa-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.simplespa.net/simplespa-documentation/daily-operations/products/inventory.md).
# Inventory
Track stock for each product and record inventory purchases and adjustments.
This page explains how to add and remove stock for a product.
Each product can have its own inventory (the number of units in stock). For each inventory purchase you record, you can add the cost per unit and the date of purchase.
## Adding Inventory
When stock is turned on, you can set the initial inventory on hand for the product. To add more inventory after that:
{% stepper %}
{% step %}
### Open the purchase prompt
Click the  button.
{% endstep %}
{% step %}
### Choose a vendor
Select the **Vendor** (if you have already added one), or use the **Adjustment** button to set "Adjustment" as the vendor.
{% endstep %}
{% step %}
### Enter the quantity, cost and date
* **QTY**: the quantity is added to the existing quantity. A negative quantity reduces the existing quantity.
* **Cost per unit**: the cost of each new unit you are adding.
* **Date**: the date this inventory was added (for example, when you received the order).
{% endstep %}
{% endstepper %}
Adding 10 items to the standing inventory of the selected product
## Removing Inventory
1. Click the  button.
2. Select the **Adjustment** button to set a vendor called "Adjustment", then enter a negative quantity.
Removing 10 items by entering a QTY of -10. No vendor is assigned when the Adjustment button is selected.
## Related
* [Orders](/simplespa-documentation/daily-operations/products/orders.md)
* [Vendors](/simplespa-documentation/daily-operations/products/vendors.md)
* [Fields and Products Settings](/simplespa-documentation/daily-operations/products/product-fields-and-settings.md)
