Ok so i admit it...i love tracking my shaving products. I’m not full blown spreadsheet (yet) but i track the price and start/end dates of everything i buy. Recently i had an interesting thought and was wondering if my math actually holds up. For that, i relying on the math wizards here at B&B (i’m looking at you @ShavingByTheNumbers !) to help me out. So recently i finished up a 16 oz bottle of witch hazel which i use after ever shave. The bottle lasted from 03/14/18 to 02/20/20. That’s 708 days best i can figure. Because i use the same amount of witch hazel as i do aftershave, i thought that perhaps i can figure out how long my current aftershave supply will last! So i counted up the ounces of my 19 bottles of aftershave and came up with 95.84oz. So, given that it took me 708 days to use 16 oz of witch hazel, how long will it take me to use 95.84oz of aftershaves assuming the same rate of use for both? I came up with a figure of 11.619 years. Does that sound correct? Thanks for the help!