Sum of "Time Estimated" for several tickets


sorry in advance if this question has been already answered here, but I
searched for a long time now in docu and mailing lists and did not find an

We are currently using RT 3.2.1 and are now looking for a functionality
allowing to build sums of “Time Estimated” for several tickets (e.g. for all
prio 1 tickets of a queue, or for all tickets with custom field “subject” =

Is something like this provided in the current version / in an extension
(e.g. RT-ProjectManager)?

Thanks for your support and kind regards!
Ulrike Schäfer