How to show the sum of a column

[AsadHaydar]

Hi Guys! 

I have a TimeReporting Report. This report show me on which projects i have worked and how long i spend on each project. 

I want to sum the time of each project and show it. The result should be at the Top and not at the Bottom

This is how it should look like(this sheet is done in microsoft office tools)

http://postimg.org/image/wuziddy7j/

Any Ideas Guys? 

Thank you!

[AsadHaydar]

I've solved the Problem:

 

1. I have to create a groupe

2. create a variable, Calculation= sum (or drag an drop the field you want to calculate and paste it on the report and select the calculation)

3. on the field go to properties->Advanced: set the Evaluation Time To "Group" and Evaluation to the goupe you want in my case "GroupTitle"

that's it!