SUMPRODUCT(...)
Calculating sum against the text as criteria
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 helpCategory: Information
Returns TRUE if the value is text
Syntax
ISTEXT(value)
0
The formula verifies if the cell contains text, if yes then it multiplies the binary array with the corresponding cell value and then calculates the sum with SUMPRODUCT.