Use the Sum Function to Calculate

Hi All,

Have it a wall with this one and i have a feeling this is something really easy that i am just not able to see.

I have a webi Report with a column say "Sample" that has "1" and "0"

I am doing a calculation directly on the column at the report level saying: IF (Sample) > 0 Then "Y" else "N"

All i need to do is find a way to Calculate all the "Y"s and post the totals on the last cell of the column.

I tried using in that cell but it doesn't work "=Sum(If ([Sample]) = "Y" then 1 else 0)"

Hope someone can help. Thanks.