How to report on planned hours (effort) ???

Hi,
We are using Wrike for professional services which includes the Wrike resource add on.
I plan work for our team in workload chart and once this is done I want to be able to report on the planned hours (planned effort) between two dates, but i cannot see any way to do this.

The main reason I need this funcitonality is because I have customers on retainers with a set number of hours per month. I need to be able to see how many hours I have planned for them so I don't go over / under. There are many other occaisons when I will need to report on planned hours also.

From the Timelog view of a project / folder it is possible to report on time spent between two dates. So the functionality exists for looking at completed time entries. I just don't understand why there is no way to do this for future planned hours? It seems like something many people would need to do.

Is there a way to do this? Am I missing something?