I need to have a worksheet that other people can use with out changing and my
problem is that I need to have a certain amount of blank cells that when a
number is entered will fill in cells that contain formulas.
Some of the formulas contain division and so I'm getting the #DIV/0! error
which prevents the columns from summing. How can I say to only sum if there
is a number in the cell so that it won't include the error. Or how can I keep
the error from showing but also have the blank cells for people to use? In
other words only "formulate" when there are numbers. I hope this makes
sense....

# of Rolls LengthM Widthmm Total M2 Width of Source Material # of cuts
across
10 500 20 100 1290 65.00
5 600 30 90 43.00
20 200 80 320 17.00
- #DIV/0!
- #DIV/0!
- #DIV/0!
Total #DIV/0!