Access is a database system, and therefore tends to work a little bit
different than how you do things in excel.
(in fact things work VERY differnt
The most common way of course is to put a sum in the footer of a report.
However if you have an invoicing type system, or simply need to sum up
column in access you need to build a form. If you looking for rows and
collums, then you built a continoues form (what the wizard calls tabular
layout)
You then simply place a text box in that forms footer
We can call the text box MySum
For the data source of that text box, simply place the following exprssion
=Sum([Name of collum to sum])
You can see a screen shot of this in an actual applciaton here
http://www.members.shaw.ca/AlbertKallal/Articles/Grid.htm
Scroll down to the "last" screen shot, and not the "sum" total at the bottom
of the form on the right side.