Here's a spreadsheet that breaks the cost down to a milliliter used basis. I based the numbers on 20mg/ml, as that's kind of in the middle of where people are on their nic usage. Obviously cost can go up or down, but these are ball park figures for comparison.
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Hey I went through your calculations and they are on the money. I took your spreadsheet and made it so people could change the mg and ml of the final product. Here is what I did:
NicSuppliers1
Dan