It is common to write custom scripts to parse and summarize the event-based CSV files generated by ACS. These files are stored in a subdirectory of
where ACS has been installed (by default this is in the "Program Files" directory).
The format of the CSV files should be straightforward if you take a look at them. By default there is one file created per day, though you can change that inside ACS.
Hope this helps.
Russell Rice