I have two columns of data. One is with foil roll widths which I actually have in stock and the other column with standard foil roll widths set/agreed to.
I want to clear up the stock, and I want to know which foil widths do not match the standard ones or appear the least on my standard foil width column. I want to allow a - or + 5cm error/inaccuracy as well. How do I easily get a list of the ones which I can get rid off (ones that do not match the standard widths)?