How to add a fragment of a similar price?

Question

WooCommerce

Hello.
How to add a new field "Run time"?
It should work similarly to the price, i.e. sum up in the shopping cart.

Answer 1

I don’t know how the rest do it, but I added a common input for all products (as an additional service) and used the woocommerce_add_cart_item_data hook, where you need to change cart_item_data['total_price']
I actually got a small calculator there: