SPOD charges merchants for shipping fees. These fees are typically reimbursed to the merchant through the customer purchase price. Therefore, when you’re determining customer end-price, make sure you’ve accounted for shipping fees.
You can find SPOD’s shipping costs here. You’re not required to adhere to these exact numbers. For instance, if you want to offer customers a discount, you can lower your shipping prices. However, you’ll be required to make up the difference, ultimately resulting in less profit.
If you’re struggling with setting up and determining your shipping costs through Shopify, this helpful guide should provide some clarity.