Good afternoon, I’m creating a tire website and each tire has to have a fee (eco value) associated with it. That is, imagine a product costing 20 euros, the cart must show 20 euros + 1.05 (eco value) + VAT.

If you have 2 products, you have to add the fee, that is, 40 euros + 2.10 + VAT.

Any suggestion?

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