Plugin for woocommerce, how to add goods to the cart in packages (sets)?

Question

WordPress

The store displays the price per item, but requires each item to be able to specify a quantity to add to the cart.
For example, the price is per kilogram, and packages are 3, 5, 10 kilograms.

Answer 1

Solved
by WooCommerce Advanced Product Quantities

Answer 2

So what's the problem? Any normal store plugin works with the number of products. Just put the cost for 1 unit of measure and attribute what kind of unit it is