I have a monthly cashflow with the data for each month in a separate columns.
To the right of the monthly data I would like to sum teh date to show a
quarterly cashflow. For the first quarter my formula is sum(b2:d2). In the
next column for the second quarter the formula should be sum(e2:g2). My
problem is that if I simply copy the formula created for Q1 it reflects
(c2:e2).

This is actually a five year cashflow so I'd really like to be able to copy
formulas to save time.

Any help would be greatly appreciated.