I am using Magento 2.2.9. I have a request to set up the discount rule as below:
- If the customer buys every 3 items of the products they will get a discount of 4$.
- The product item can be a different product child of a configurable product.
E.g configurable product A has 3 child B, C, D
- If I buy 2B + 1D, I will be discounted 4$.
- If they buy 6 items, they will be discounted 8$.
I have tried different configurations on the cart price rule but it does not help. Could you advise me on how to configure to meet the requirement? Thank you so much.