I tried a fix like under "excel array formula: not have to 'ctrl-shift-enter'?" Here's my formula:
=(0*0)+SUM(IF(A10=Bundle!$B$2:$B$58233,1/(COUNTIFS(Bundle!$B$2:$B$58233,A10,Bundle!$N$2:$N$58233,Bundle!$N$2:$N$58233)),0))
The "before the fix" formula works, but there are a lot of rows, and it would take a long time to Ctrl+Shift+Enter all 2624 times. I added the code as suggested and the "0*0" like above, but it didn't work. Do I have to do something to activate the code?
This and several other posts online suggest that array formulas will just fill-down, but that doesn't work either.
Thanks, John