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Jim May
 
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Default Need to bring back Average using either Sumproduct or CSE formula

I have lines of data with 1 field ColB such as 01017340 (text) and
i have 50 lines all with 01017340 but in ColM 28.53%, an other 26.11%
and so on. The First two characters XX017340 and Compnay numbers
I have 25 companies and need the Average of each.
What formula could I use to acheive this?
TIA,
Jim