Hi @Kai, shouldn't be a problem, although it takes a bit of a workaround and the product total has to be a multiple of 20. This is how you do it:
- Add the products you'd like to your cart (choose any amount);
- Go to your cart;
- Change the amount per product to your liking (make sure the total is a multiple of 20);
- Update your cart.
The shakes and bars are viewed as separate product types and thus can't be mixed. So 22 x Original FF + 18 x Light OA + 20 Vitaminbar Banana is possible, but 12 Vitaminbar Banana + 8 shakes isn't, unfortunately. The bulk discounts are applied as usual.