Multiple shipping fees for same category items

Hi,

I've created a shop that offers both digital content (downloads) and physical products (CDs). The CDs are assigned to a specific category for which shipping costs apply.

However, I’m facing an issue: if a customer orders several CDs from this category, the shipping fee is charged multiple times — once for each item.

Is there a way to configure the system so that the shipping cost is charged only once per order, as long as at least one CD from that category is in the cart?

Thanks a lot for your help and best regards,
Tina

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