What you have is a solution of nicotine in a 50/50 solution of pg/vg. (W/V means they measured by weight, not volume)
At 6.0% nicotine, that means your mixture is 60mg/ml of nicotine.
Hope this helps
Good grief. Even I misread the label at first, thinking it was 4.8% or 48mg/ml. Glad I re-read it.