Index: app/models/query.rb
===================================================================
--- app/models/query.rb	(revision 4884)
+++ app/models/query.rb	(working copy)
@@ -503,6 +503,14 @@
     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 => Issue.merge_conditions(statement , "#{Issue.table_name}.rgt - #{Issue.table_name}.lft = 1"))
+  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
@@ -523,6 +531,27 @@
     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 => Issue.merge_conditions(statement ,  "#{Issue.table_name}.rgt - #{Issue.table_name}.lft = 1"))
+      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: app/controllers/issues_controller.rb
===================================================================
--- app/controllers/issues_controller.rb	(revision 4884)
+++ app/controllers/issues_controller.rb	(working copy)
@@ -85,7 +85,8 @@
                               :order => sort_clause, 
                               :offset => @offset, 
                               :limit => @limit)
-      @issue_count_by_group = @query.issue_count_by_group
+      @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: app/views/issues/_list.rhtml
===================================================================
--- app/views/issues/_list.rhtml	(revision 4884)
+++ app/views/issues/_list.rhtml	(working copy)
@@ -19,7 +19,7 @@
     <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 %>
@@ -34,3 +34,7 @@
 </table>
 </div>
 <% end -%>
+<p align="right"
+    Current page: <b><%=issues.reject{|issue| issue.children?}.collect(&:estimated_hours).reject {|hours| hours.nil?}.sum %></b>
+    <%= l(:label_total) %>: <b><%=@query.issue_sum %></b>
+</p>