Hi there. I sell decor pillows. I have these on my website as the pillow cover only, and set up shipping for these at a flat rate. I also set up a modifier to add the pillow insert; however, in doing so, the shipping flat rate needs to change. How can I reflect a different shipping rate depending on the modifier they select? Or do I have to have different categories of these online, for example list everything under pillow covers only and then another section with pillow covers and inserts to attach the appropriate shipping rate? The program doesn't seem to give us enough unique options.
