Forum Discussion
Excel IF/AND/OR formula support
I've attached an example created simply as a demonstration--it does use the LET function which is very new, so you'll need to have the most recent version of Excel to make it work. If it doesn't work for you, please let me know and I'll find another example.
This example calculates US income tax, and is somewhat comparable to your situation in that I actually have multiple tables underneath the central formula--one table for each of the different tax filing statuses possible--and all it is doing is a single calculation based on a single input, but it uses the VLOOKUP function to access the appropriate row of the appropriate table.
Beyond that, or maybe BEFORE that, since you are a beginner in Excel, it might be helpful if first you just look at a basic primer on tables and VLOOKUP. Here are some links that could be helpful in that foundational learning:
Tables: https://exceljet.net/excel-tables
VLOOKUP: https://exceljet.net/excel-functions/excel-vlookup-function