> For the complete documentation index, see [llms.txt](https://options-docs-v2.avisplus.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://options-docs-v2.avisplus.io/pricing-and-upsell/add-charge-add-ons/add-charge-by-quantity.md).

# Add-charge by Quantity

The Add-charge by Quantity feature allows merchants to apply additional charges to products based on the quantity customers input. This feature provides two flexible pricing options to accommodate various business needs: **Price for Each Quantity** and **Price for Any Quantity**.

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#### 1. Price for Each Quantity

With this pricing type, the entered quantity is multiplied by the add-on price. This option is ideal for situations where the cost increases proportionally with the quantity selected.

**How it Works:**

* The add-on price is set for one unit of the additional feature or service.
* When a customer selects a specific quantity, the total add-on charge is calculated as:

  **Total Add-on Price = Add-on Price x Quantity Selected**

#### 2. Price for Any Quantity

With this pricing type, the add-on price remains fixed regardless of the quantity entered. This option is suitable for flat-rate additional features or services that do not depend on quantity.

**How it Works:**

* The add-on price is set as a single fixed amount.
* Customers can enter any quantity, but the add-on charge remains the same.