> For the complete documentation index, see [llms.txt](https://docs.dataloy.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.dataloy.com/release-5.47-1/voyage-management-system/step-by-step-guides/cargoes/maintain-cargoes/cargo-drawer/freight-rate-tiers.md).
# Freight Rate Tiers
The tiered freight rates feature of the Cargoes module lets you model more advanced rate structures.
## Models
A dropdown selector at the top lets you select different pricing models your tiers should be based on.
* **Tiered**: In tiered pricing, the per-unit freight rate are assigned to quantity-based ranges (tiers). When calculating the total freight, quantities are purchased from successive tiers, starting from the lowest.
* **Volume**: As with tiered pricing, the freight rate is quantity-based. However, the per-unit freight rate is dependent on the range within which the total quantity falls. So under this model, you would define the quantity ranges and the per-unit freight rate for each.
## Creating and editing tiers
1. Click Create 
to add a new tier.
2. In the dialog window, enter the quantity at which the tier should start at, the freight rate per unit of quantity, and a flat-fee lump sum.
When you create a new tier or edit an existing tier, the end of the range of the previous tier is automatically adjusted to align with it.
---
# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.
## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:
```
GET https://docs.dataloy.com/release-5.47-1/voyage-management-system/step-by-step-guides/cargoes/maintain-cargoes/cargo-drawer/freight-rate-tiers.md?ask=&goal=
```
`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.