> 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.
- [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.


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