Hi, I'm trying to write a formula to calculate the sum of the n groups of the products of 3 columns. For example =SUM(PRODUCT(B3:D3),PRODUCT(B4:D4),PRODUCT(B5:D5)) would be a basic answer, but this would be tedious to do if the number of rows were a lot larger. I know I could create another column for the products, then a cell for the sum of these products, but I was just wondering if I could do it without this additional step.
Solved by K. C. in 20 mins