If you run a store with a range of Products and expect regular orders including Products printed by Lulu Direct and other Products (such as tee shirts), we advise creating Custom Shipping Profiles for your Lulu Direct Products and for any other Products you have for sale in your store. 

With Custom Shipping Profiles set up, a customer can order a Lulu Direct Product and another Product, and Shopify will add the shipping prices for both Products during checkout. As a result, your customer will be shown one consolidated price for each shipping option available to them.