How can I offer a 30% discount on selected products without including the main item?

[DigitalisGlobal]

I want to give two selectable products below the main product to give 30% OFF on them. For example: 

A is the main product.

B and C are offered products below main product like frequently bought together bundle.

When A and bought users have option to choose B or C or both, 30% off will be applied to B or C or both but not to the main product.

I have tried fast bundle, Shopify discounts, frequently bought together app. But in these discount is applied to main product as well, which we do not want. We want to give discount only on B and C not A.

[BundleKit]

Hi @DigitalisGlobal 

This is Jun from Bundle Kit. 

While our app is not exactly the one you're looking for, perhaps you could give it a try.

Our app will let you discount the entire order by entering a fixed price. You can read more about it here: https://help.bundlekit.io/overriding-bundle-price

You can also choose to display the discounted price as a sale price: https://help.bundlekit.io/displaying-bundle-price-as-a-sale-price

Let us know if you have any questions.