Calculation help

[kermit]

I'm trying out my first mix, im using ejuice me up site for my totals, added all my volumes in and when it calculates it says I'm in negative pg and I need to add more, I can't see an option to add pg, my nic and concentrates are pg based, anyone any ideas

 

[walks]

It means you've set a ratio that you can't mix to, so for example, if you've specified a mix ratio of 80/20 VG/PG but your flavours are 20% and then your nicotine is also in PG, this means the PG content of the mix is higher than 20%