SUMPRODUCT(...)
Two way lookup with SUMPRODUCT() function
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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A two way lookup can be performed by using SUMPRODUCT if we use "&" to connect the criteria as well as lookup range.