I would like Excel to return answer as zero if any of the values in that sum range is zero.
I have tried a combination of logical tests, but I can't get what I want.
My immediate reaction was also multiplication but perhaps less computationally intensive would be to sum only if a zero is not found in the source.
Assuming the array is
You could multiply all the values in the range. If one value is zero the result will be zero and then you can use that in a test to either multiply the sum by 0 or 1.