=IF(AND(C30,ISNUMBER(C3)),B3/C3,"")
Note, the "" is 2 double quotes. This will effectively leave the cell blank.

Hope this helps. If not, give a little more info, as you state ..column d to
total at the bottom..
--
John C


"Renae" wrote:

I am pretty new to excel so any advice will help! I am working on a fuel
spreadsheet, we do not always fuel everyday in all trucks so I have several
cells with no numbers in them and get the DIV/0! error is there an easy way
to correct this? My formula is set up as b3/c3 in d3 and then they want
column d to total at the bottom is this possible?

Thanks in advance for your help!
Renae