Adding a shipping cost allows you to see your shipping margins and set your prices accordingly.
This is a feature that needs to be turned on in the Settings area. To turn on Shipping Markup, just go to Settings > Company > Defaults and select the checkbox under "Shipping Markup."
Now when you go back to the Builder you will see a new "Shipping Cost" field when editing line items.
Once you have added your shipping costs/prices, you will see the margin reflected in the shipping graph in the Builder and on the Overview page.
We hope this helps! Please reach out to us in support chat if you have any questions 🙂