This is an urgent issue, I can't believe there is no solution for this. I guess I'm wrong, as this is too basic.
I want to sell postcards with a cheaper shipping rate, and all other products with a higher standard shipping rate.
If someone is ordering both, postcards and standard bigger products, for sure, I just want to take the higher shipping rate and not have the shipping rates added up.
Totally normal stuff right?
How can I do this?
I do NOT want to buy any app for this!!