What if you want analytical (or calculations like sum, average, max, min etc ) data from different modules on a single page. Eg: Total of Opportunities closed by any user in last six months, or for that matter for entire team.
In this video, we discuss what is need of summation report, with one practical example, and then try out various combinations that can help you. Go out and try your own reports with your own combination. This is just starting point. There is a long way to go.