Thanks for everyone's help, here is the problem I am trying to solve
I have two sheets within a workbook;

On sheet one I have three columns;

Column A has a list of dates, Column B has a list of dollar amounts and
Column C has random words

It looks somewhat like this

Column A Column B Column C
10/24/2008 $100 Dog
10/23/2008 $220 Cat
10/20/2008 $100
10/19/2008 $115 Dog
10/19/2008 $230
10/18/2008 $115 Mouse
10/16/2008 $300


On the second sheet I have a list of dates and I want to find out the total
revenue from column B on the first sheet between two dates, say 10/19/2008
and 10/23/2008 and that have words written in column C.

I then want to do the same thing with things that don't have words written
in Column C.

Any help would be greatly appreciated!