> For the complete documentation index, see [llms.txt](https://docs.rmhpos.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.rmhpos.com/store-manager/configure-pos-and-store-manager/inventory-and-purchasing.md).

# Inventory and purchasing

- [Inventory rules](https://docs.rmhpos.com/store-manager/configure-pos-and-store-manager/inventory-and-purchasing/setting-up-inventory-rules.md): This topic describes how to configure inventory rules. These include cost update method to use when receiving POs and whether to include landed cost in the cost calculation.
- [Understanding landed cost](https://docs.rmhpos.com/store-manager/configure-pos-and-store-manager/inventory-and-purchasing/calculating-landed-cost.md): This topic describes the three cost distribution methods used by RMH to determine landed cost.
- [Ordering rules](https://docs.rmhpos.com/store-manager/configure-pos-and-store-manager/inventory-and-purchasing/setting-up-ordering-rules.md): This topic describes how to configure ordering rules for quotes, work orders, layaway orders, and back orders. The rules control expiration date (or due date) and deposit requirements, if applicable.
- [Units of measure](https://docs.rmhpos.com/store-manager/configure-pos-and-store-manager/inventory-and-purchasing/units-of-measure.md): This topic describes how to configure a unit of measure (UOM). You should define the UOM used to sell items, as well as the UOM used to order items from suppliers.
- [Price rounding rules](https://docs.rmhpos.com/store-manager/configure-pos-and-store-manager/inventory-and-purchasing/setting-up-rounding-rules.md): This topic describes how to configure price rounding rules for items.
- [Shipping methods](https://docs.rmhpos.com/store-manager/configure-pos-and-store-manager/inventory-and-purchasing/setting-up-shipping-methods.md): This topic describes how to configure the shipping methods the store uses.
- [Shipping carriers](https://docs.rmhpos.com/store-manager/configure-pos-and-store-manager/inventory-and-purchasing/shipping-carriers.md): This topic describes how to configure the shipping carriers used by the store.
- [Payment terms](https://docs.rmhpos.com/store-manager/configure-pos-and-store-manager/inventory-and-purchasing/setting-up-payment-terms-for-purch.md): This topic describes how to configure payment terms for suppliers and POs.
- [Purchasers](https://docs.rmhpos.com/store-manager/configure-pos-and-store-manager/inventory-and-purchasing/setting-up-purchasers.md): This topic describes how to configure purchasers.
- [Charges](https://docs.rmhpos.com/store-manager/configure-pos-and-store-manager/inventory-and-purchasing/setting-up-charges.md): This topic describes how to configure charges.
- [Order settings](https://docs.rmhpos.com/store-manager/configure-pos-and-store-manager/inventory-and-purchasing/setting-up-order-settings.md): This topic describes how to configure PO settings, such as whether to auto-release POs, check supplier MPQ when ordering, or whether to consider child items or kit items when ordering.
- [Item settings](https://docs.rmhpos.com/store-manager/configure-pos-and-store-manager/inventory-and-purchasing/item-settings.md): This topic describes how to configure custom item property fields for items. You can configure these custom fields to capture data that is unique to the types of items that you sell.


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