SUMPRODUCT(...)
Using Sumproduct to check for multiple criterias
Used Functions
Category: Math and trigonometry
Returns the sum of the products of corresponding array components
Syntax
SUMPRODUCT(array1, [array2], [array3], ...)
Practice SUMPRODUCT Formula at Sheetzoom
SUMPRODUCT formula at Microsoft help
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The Sumproduct function can validate multiple criteria and the final count is measured and summed up by the function to give the answer.