Hello Mohamed,
This forum isn't really meant to teach you how to build a full blown report - I suggest you speak with the sales rep about taking one of our classes or check out Cognos online as they offer instruction as well. I can give you some starter fields so if you have specific sticking points, please mention them and we'll try to help out.
Thanks!
Task fields: Planned Work Hours, Actual Work Hours, Planned Labor Cost, Actual Labor Cost and Period can be many things either Task Date Groups, Work Entry Date or some other date.