In the late 90s when I went to college and bought toilet paper on my own for the first time, one brand had 260 sheets and most of the other brands had shrunk to 200 sheets per roll. There was no such thing as 16=4 etc. It's amazing that today a "roll" has 51 sheets on it.

I stopped buying all of these brands and just buy the Sams or Costco TP. No bad math required.