Under your Pricing Rules, you can choose to automatically add the shipping rate of each item into the Product Price (and Compare at Price). If you set your rules as such, then the respective shipping rate of an item will always be added to its Product Price (and Compare at Price).
For more information on how shipping rates are determined, please read our article on How Shipping Rates are Determined.
A note on our default settings for added shipping costs:
If you have added products from Wix's Find Products to Sell section, the shipping rate is automatically included in the price of the product.
If you added products any other way, default Pricing Rules are set to exclude the shipping rate from the Product Price (and Compare at Price).
Any changes made to the Pricing Rules only go into effect after the changes are saved.