Hi All,
I'm using a SUMPRODUCT formula to sum some data according to their category.
For the sake of the data, I have 1 and 0 running along the rows and columns, and i want it to sum the data if it's both a 0 at the top of column and 0 at the side of row. THis is so i can turn different data "on" and "off"
I have attached an example,
Thanks
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