+// If predefined expenses are configured, add controls to select an expense and quantity.
+$predefined_expenses = ttGroupHelper::getPredefinedExpenses();
+if ($predefined_expenses) {
+    $form->addInput(array('type'=>'combobox',
+      'onchange'=>'recalculateCost();',
+      'name'=>'predefined_expense',
+      'style'=>'width: 250px;',
+      'value'=>$cl_predefined_expense,
+      'data'=>$predefined_expenses,
+      'datakeys'=>array('id', 'name'),
+      'empty'=>array(''=>$i18n->get('dropdown.select'))));
+    $form->addInput(array('type'=>'text','onchange'=>'recalculateCost();','maxlength'=>'40','name'=>'quantity','style'=>'width: 100px;','value'=>$cl_quantity));
+}