Index: controllers/issues_controller.rb
===================================================================
--- controllers/issues_controller.rb	(revision 3363)
+++ controllers/issues_controller.rb	(working copy)
@@ -73,6 +73,7 @@
                               :offset => @issue_pages.current.offset, 
                               :limit => limit)
       @issue_count_by_group = @query.issue_count_by_group
+      @issue_sum_by_group = @query.issue_sum_by_group
       
       respond_to do |format|
         format.html { render :template => 'issues/index.rhtml', :layout => !request.xhr? }
Index: models/query.rb
===================================================================
--- models/query.rb	(revision 3363)
+++ models/query.rb	(working copy)
@@ -415,6 +415,13 @@
     raise StatementInvalid.new(e.message)
   end
   
+   # Returns sum of all the issue's estimated_hours 
+  def issue_sum
+    Issue.sum(:estimated_hours, :include => [:status, :project], :conditions => statement)
+  rescue ::ActiveRecord::StatementInvalid => e
+    raise StatementInvalid.new(e.message)  
+  end   
+  
   # Returns the issue count by group or nil if query is not grouped
   def issue_count_by_group
     r = nil
@@ -435,6 +442,26 @@
     raise StatementInvalid.new(e.message)
   end
   
+   # Returns  sum of the issue's estimated_hours by group or nil if query is not grouped
+  def issue_sum_by_group
+    r = nil
+    if grouped?
+      begin
+        r = Issue.sum(:estimated_hours, :group => group_by_statement, :include => [:status, :project], :conditions => statement)
+      rescue ActiveRecord::RecordNotFound
+        r= {r => issue_sum}
+      end
+      
+      c = group_by_column
+      if c.is_a?(QueryCustomFieldColumn)
+        r = r.keys.inject({}) {|h, k| h[c.custom_field.cast_value(k)] = r[k]; h}
+      end
+    end
+    r
+  rescue ::ActiveRecord::StatementInvalid => e
+    raise StatementInvalid.new(e.message)
+  end
+  
   # Returns the issues
   # Valid options are :order, :offset, :limit, :include, :conditions
   def issues(options={})
Index: views/issues/_list.rhtml
===================================================================
--- views/issues/_list.rhtml	(revision 3369)
+++ views/issues/_list.rhtml	(working copy)
@@ -18,7 +18,7 @@
     <tr class="group open">
     	<td colspan="<%= query.columns.size + 2 %>">
     		<span class="expander" onclick="toggleRowGroup(this); return false;">&nbsp;</span>
-      	<%= group.blank? ? 'None' : column_content(@query.group_by_column, issue) %> <span class="count">(<%= @issue_count_by_group[group] %>)</span>
+      	<%= group.blank? ? 'None' : column_content(@query.group_by_column, issue) %> <span class="count">(<%= @issue_count_by_group[group] %>, <%= l(:label_total) %>:<%= @issue_sum_by_group[group] %>)</span>
     	</td>
 		</tr>
 		<% previous_group = group %>