Thanks for your reply and for more details.
We decided to place the calculator below the cart, after researching the optimal solution with WooCommerce users.
In your case, such freedom in placing the calculator can indeed be very helpful. We will take your feedback into account in further development of the plugin.
If you would like to be notified of such an update, please contact us at octolize.com/support, we will send you an appropriate notification. (This thread will be automatically closed, so it will be hard to do it through this forum).
In case of any additional questions, please let us know.
Best regards,
Tomek