diff --git a/webapp/controller/DailySelectionController.class.php b/webapp/controller/DailySelectionController.class.php
index e0335332..760f2334 100644
--- a/webapp/controller/DailySelectionController.class.php
+++ b/webapp/controller/DailySelectionController.class.php
@@ -100,7 +100,11 @@ class DailySelectionController extends BaseAuthedController {
         $this->save();
         $propertyChgService = new PropertyChgService();
         $propertyChgService->addUserChg();
+
+        ++$count;
+        $newCost = $count < $maxCount ? $arrCosts[$count] : -1;
         myself()->_rspData(array(
+            'cost' => $newCost,
             'property_chg' => $propertyChgService->toDto()
         ));
     }