I'm currently summing a column of numbers using the
following formula:
=sumif(BA23:BA500,"y",N23:N500)

I would now like to break down the sum based on a second
condition ie. only sum the column cells where the above is
true and where the value of the cells in another column
equals 0 or 1 or 2 etc.
What I'm trying to do is derive subtotals of the sum above
based on the revision level where the BA cells are set
to "y". Does anyone have a suggestion?