Thanks for your suggestion, I will include it in one of the next version.

Last weekend I found some time to extend the functionality a little bit, Now I'm working on finishing following (in my oppinion essential) missing features:

• add/edit/remove single periods of current projects
• adding time units and cost per unit

I submitted the basic version to QA and will update the application in the future with this features. If you have any more suggestions please let me know.