Comment 9 for bug 220778

So, 0.8.0 lets you view previous days. And by switching to the summary view (Alt+3) you can see totals for each category.

What's missing is the ability to view the totals for a given week or month. I've a plan for this (view menu items and/or toolbar buttons for switching between daily/weekly/monthly views), but no idea when I'll get around to it.