Show running total even if issue doesn't have line items but it's children do

app/views/line_items/_issue_line_items.html.erb

@@ -1,8 +1,12 @@
-<% if @issue.line_items.any? %>
+<% if @issue.line_items.any? || @issue.descendant_line_items_total > 0%>
 <hr/>
 <div>
   <p><strong><%= t :label_line_items  %></strong></p>
 
+  <% total = 0 %>
+
+  <% if @issue.line_items.any?%>
+
     <table class="list line-items-table">
       <thead>
         <tr>
@@ -14,7 +18,6 @@
       </thead>
 
       <tbody>
-      <% total = 0 %>
 
         <% @issue.line_items.each do |item| %>
           <% line_total = item.quantity.to_f * item.unit_price.to_f %>
@@ -29,14 +32,19 @@
         <% end %>
       </tbody>
 
+      <% end %>
+
       <tfoot>
+        <% if @issue.line_items.any?%>
           <tr>
             <td colspan="3" style="text-align:right;"><strong><%= t :label_total %></strong></td>
             <td>
               <strong><%= number_to_currency(total) %></strong>
             </td>
           </tr>
-      <% if @issue.children? %>
+        <% end %>
+
+      <% if @issue.descendant_line_items_total > 0 %>
         <tr>
           <td colspan="3" style="text-align:right;"><strong><%= t :label_running_total %></strong></td>
           <td>