It would be good to see a total duration of completed activities easily on each deal page.  In order for me to track the amount of effort that is spent on an individual deal I have to currently pull all activities out in a .csv and total up in Excel.  We are keen to be able to see how much time is being spent on deals that aren't really progressing.  Currently in the GUI we can just see how long a deal has been open for and how long at each stage, but we are more interested in total amount of effort per deal and would like to be able to see this easily in the web app.

Apologies if this has already been requested but I couldn't find it.