We have products with different weights and sizes. We need different shipping cost applied to each of them.
when user buy two of product A
2 X £10 = £20 (cost of 2 items)
2 X £5 = £10 (shipping)
I use the flat rate
5 * [qty]
It gets applied to all products.
But I have other products, eg Product B, costs £20, shipping costs £7. How to do that with that flat rate above?