this article about SharePoint views Peter Kalmström, CEO and Systems Designer
of kalmstrom.com Business Solutions, shows how the Totals feature can be used
to summarize the numbers of a column.
The SharePoint Total can also show other values, like average, maximum and
minimum, and you can also
use it to count the number of items in a column.
Enable the Totals feature for a column
Create a new view or modify an existing view.
Scroll down to Totals and click on the plus sign.
Select the value you want to calculate from the dropdown to the right
of the column that should have the Totals.
In the demo below Peter shows how you can use the Totals feature to count
employees in each department. He creates a grouped view that shows the totals
per department and then edits the page to show these totals in a web part.