Extra Custom Product Options for WooCommerce

We want the add on increased price based on Qty, do you have such function, such as this one, if we add a hand tag to the packaging, for different Qty will be based on different price. All other functions of this plugins we are happy with, we only need to increase this one, can you touch with me for more details, thanks! Here is my mail, kevin.gu@lixuangames.com, I can share you more what I want, thank you firstly.