We sell two different types of items, one small and very light, the other large and heavy, and have flat shipping rates separated by weight for both. For our small items we currently have standard shipping (First Class) for $5. We would like to offer an additional option for customers to choose expedited shipping (3 day Priority Mail) for $8, but I am unable to figure out how to set that up. Is this possible, and if so, how? We have to make sure that this expedited shipping is not an option for the large items.
Thank you!
