RTC Epic Query/Report that adds up all Estimated Task Hours

I currently have a client using RTC 4.0.6. Their out-of-the-box setup is as follows: Epic -> Features -> Users Stories -> Tasks. There is a field in their tasks called "Corrected Estimate". The client requires a report or query that they can report on from the Epic level which will give them the sum of all "Corrected Estimate" hours of all tasks that belong to that specific Epic. So for reporting purposes they would like to know the total number of hours estimated for all tasks in that Epic. Is this possible out-of-the-box?

Thanks

Leesen