I have 3 tasks. I open my list task and Selected list then clicked 'Modify View'. After I open option 'Group By' and add new group on status. I got 2 groups:
1. 2 tasks - status in works
2. 1 task - status not started
After I Selected my list task then clicked 'Modify View' and open option 'Summary' and change summary status (on cost). I got summary group tasks.
Summary = 3
+ Status In works Summary = 2
+ Status Not started Summary = 1