Is there an app or a super easy formula for this? I got some zero nic liquids yesterday and want to add nic to them. They are all 30 mil bottles. I use 3 and sometime 6 (if the company does not offer 3) I found on mfs that the lowest they had was 24. Any help would be appreciated. If there are other places to get the nic that would be nice too. Nic to me is like adding salt to bland food. I just need a little and it makes the flavors pop. Lol