> 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/up-charge-for-specific-variants/one-time-add-charge-legacy.md).

# One-time add charge (Legacy)

Go to main page of **Shopify admin -> Avis Product Options -> Avis Option**.\
Click on Create Option Set, then add an Option type for extra charges **(Radio Button, Drop-down Menu, Color Swatch, and Image Swatch)**.

<figure><img src="/files/Rg06buCu07kCxels1xwE" alt=""><figcaption></figcaption></figure>

Fill in the values that you want to set charges, for example, we have here the sizes with different price point.&#x20;

<figure><img src="/files/RN6xTixW2flTclKChA9s" alt=""><figcaption></figcaption></figure>

In this case, we want the size to count only as 1 regardless of the main product quantity.

Tick on "One time add charge"

<figure><img src="/files/LypdC37cpgMX4TUpxOUX" alt=""><figcaption></figcaption></figure>

Choose your desired group of option and hit "Save"

<figure><img src="/files/KwrsjSffvPlfcG9d1irY" alt=""><figcaption></figcaption></figure>