Hey jeewan,
If i understood your question properly its all about the axis value of month & totals invariable product & employee. In this case remove the totals coming from the webi report. create a sum formula 30 rows below. But make sure how many records you will comsuming at the maximu level if you include all the values in the list builder and then decide where to right this sum formula. Now pick the month from the top and total from cells where you have written the sum formula.
Got it, does it helps!!!