First of all, what would be a good book to get to help a new user with
learning how to create macros for Excel? The Dummies books don't seem to help
with the more advanced functions.

Next I want to apply a formula to a range of cells in a column. I have
successfully done this but my range of cells is o4:o330. The problem is that
it puts 0 in all the cells below the cell with the last value in it.

The scenario I am dealing with is this:
I need to apply the formula =sum(cell*.75) to only the cells with values in
them in column o starting with o4 (o4 is the starting cell for all of my
values)

Special Thanks again to Don and Mike for their help with my previous question!