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Ron Rosenfeld[_2_] Ron Rosenfeld[_2_] is offline
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Default countif - unique values only

On Mon, 10 Sep 2012 19:23:30 -0700 (PDT), wrote:

the part numbers are at the top of the column. lets call it part A and part B. on your layout part A requires tools 1,2 and 3 and part B requires tool 1,3


In your original post, you wrote you had three columns A - B - C with the tools in Column C. That would imply only two part numbers based on what you've written above. Surely you must have more than two part numbers, if this is a real life problem. And, if so, it seems unlikely that your tools are listed in column C. Please, how is your data really set up? That information will make crafting a solution much more efficient.