Hi,
The below is my custom filter, what I'm trying to do from the highlighted part is that I want to add additional codes but i want to add them as range because there would be quite a lot of codes to type in into my Group not in section.
The original [Group] column has codes in the format you can see in the quotation mark.
I have created [Group (numbers only), to strip the letters off which allows me to use ToNumber but To number will be included in as true, I want to exclude that range, whats the function for that, is this even the best way.

cheers