Sorry man, your screenshot, even when I click on it, is super small so I can't see exactly what you're referencing...
I'm not familiar with the spreadsheet your using, but it reminds me of accounting homework from college (no offense if whoever made it reads this). Have you tried using ejuicemeup as a calculator? IMO, it's super easy and fairly intuitive.
I too make the the vast majority of my juice at 50/50 as the final product. My unmixed nic is 100% PG, 36mg. I take 100ml of that and add it to 100ml of VG, giving me a pre-mixed base of 50/50 @ 18mg. My final products usually end up as either 12mg or 6mg depending on what I'm making.
Also, as a friendly word of caution, 100mg nicotine is pretty serious business, and something you may want to read more about on here before actually making that purchase. I feel pretty confident as a DIYer, and for me, the risks associated with working with a nic level that high is not worth the savings seen by diluting it down. Just a friendly word of caution.
