As far as I know, there is no easy way to get this information. When marketplace was first introduced, there were several request to have the totals broken down on a day/month/cumulative basis, but to no avail. After all, and as you say, it's what merchants need.
I agree with you that the *Totals*, which are accumulated since day 1 of marketplace are becoming increasingly irrelevant.
Sadly, in this computer age, you need a pencil and paper to get what you want.