I have a question similar to above...I ran a screen for india...inlduded the Bombay and NSE exchanges...added only roe > 10 as a condition which yielded 12 results...but no cum results...if there are no other conditions limiting the 12 results, I don't see how the cum results could be zero...

It is possible that the 12 results were outside of the markets that you limited your screen to. The total results includes all of the markets that you have selected from the markets menu. If you limited those markets in your screen, you might have matching results in other markets that are filtered out by the earlier condition.