I would like to make this promotion:
Select product A + product B1 = will get a free gift
Select product C + product B1 = will get a free gift
Select product A + product B2 = will get a free gift
Select: product A + product C = no free gift
Select: product A + product C + product B1 = will get a free gift
Select: product A + product C + product B1 + product B2 = will get a free gift
So, free gift only if product B is in the basket. The difficulty I have is, that I have 3 products B, so B1, B2, B3. Any selection of any B1,B2 or B3 in the basket with product A or product C will get a free gift.
How do I need to set the coupon to work? If I have only one product B it works.