Multiple rows in total of a group

Hi,

I have a tablix report which looks like this:

Unit1Project1 Line1 Value

Unit1 Project1 Line2 Value

Unit1 Project1 Line3 Value

Unit1 Project2 Line1 Value

Unit1 Project2 Line2 Value

Unit1 Project 2Line3 Value

I have groups made on Units, Projects and Line. Number of lines is always the same (3 for example above). Of course number of Units and Projects is different as it depends on parameter.

Now I would like to make totals for Units by Project, which would sum not all the values in but would sum by lines. To give an example:

Unit1Total Line1 SUM(Value)

Unit1 Total Line2 SUM(Value)

Unit1 Total Line3 SUM(Value)

Unit1 Project1 Line1 Value

Unit1 Project1 Line2 Value

Unit1 Project1 Line3 Value

Unit1 Project2 Line1 Value

Unit1 Project2 Line2 Value

Unit1 Project2 Line3 Value

If I use Group -> Add Total it summarize all the lines together, but that's not what I want.

Anybody have any suggestions how to do it?

Thanks,

Danijel