Hi Jeremy,
You can use the Join macro, that will join selected (contiguous)
columns into the first of the selected columns so that it is all one
value
per row.
Rearranging Data in Columns
http://www.mvps.org/dmcritchie/excel/join.htm
Max's reply may be a bit vague, he is suggesting
converting the columns to values thereby removing
formulas. He didn't really tell you how to then join them,
but that would have been by concatenation into a new cell.
F1: =C1 & " " & D1 & " " & E1
Use the fill-handle to copy the formula down
Then delete columns C, D, and E
Using a macro makes things a lot quicker, since you simply
select a contiguous group of columns and run the macro,
and will probably have to do this on many occasions.