Issue
There are moments that you see the shipping price soar when activating Slide cart. The reason for this is the Additional Products that you have created are the real products in your store and they are set as Physical product at the moment.
Solution
You just need to direct back to the Product settings, and untick the box "This is a physical Products"
If the issue persists, reach out to our team through Live Chat or Email: help@opusecom.co 😍