Email Eater- update time worked for comment

[joeblough]

Anyone able to update time worked on a ticket when submitting an update (commment) or new request??

Current template:
%STATUS=Acknowledged
%TYPE=R
%REQUEST_ID=
%ASSIGNEE=joe.blough
%ROOTCAUSE=
%GROUP=
%CUSTOMER=
%AFFECTED_RC=
%CATEGORY=Software.EnterpriseApplications.Other
%Summary=
%DESCRIPTION=

Want to add:
%?Time_worked?= (what would this one be?)

Thx!