Robin... you want 70VG/30PG?? or 70PG/30VG?
if you are wanting 70PG/30VG
you will need 27.5L pg and 12.5L VG
better yet do it this way
take an empty 100 ml bottle...
add 6 ml of 100 nic PG
add 64 ml of PG
add 30 ml of VG
this should make about 415 bottles of 70PG/30VG 6 nic juice....
Thank you

Copied and posted it to my desktop.
It's the 70PG/30VG