Looks like your cost per ml minus any flavoring is around 3 cents. Using 12.5 mg/ml half of each ml will be nic base @ $0.0265 and the other half pg or vg @ $0.0035.
Thank you. That is more or less where I arrived as well. That's only about $1.00 per 30mL. Now I know that the cost of flavor and bottle has to be added as well, but online suppliers are charging $15 to $25 for 30mL. I refuse to do that math at this point but that really is an astronomical markup. And frankly, I am blessed with a financial situation where I can certainly pay their prices and a lot more, but the principle of the thing (1000%+ markups) just irritates me. And I know that buying in extreme bulk decreases their costs to much less even than mine.
Hmmm....I see a possible business venture in my future. It wouldn't be hard to undercut all of them.