How to implement such a count with Woocomerce product attributes?

Question

WooCommerce

Need this option on the product. When selecting the "add overlock" parameter, the overlock cost was added to the cost according to the formula:
(Attribute value + length from the quantity field)*2.

Here is an example of how it works, but this is not Woocommerce https://enita.com.ua/product/betap-komet/

Answer 1

something like this, here it is crooked, but still working like
https://gist.github.com/WP-Panda/a16f2da4fc5f514a4...