Ah, sorry about missing that!
If I got you right, you are looking for a way to connect your widget with the cart on your website and dynamically pull values from the Results section there.
In this case, unfortunately, it’s impossible to implement this feature. We already have such a request on the Wishlist. Feel free to upvote this request - Connect Calculator with Cart on my website.
However, if I misunderstood you, please provide more details on your use case 