diff --git a/hb_server/apps/wpm/serializers.py b/hb_server/apps/wpm/serializers.py
index b8c4ad5..bf90ce3 100644
--- a/hb_server/apps/wpm/serializers.py
+++ b/hb_server/apps/wpm/serializers.py
@@ -261,8 +261,7 @@ class OperationListSerializer(serializers.ModelSerializer):
         if obj.step.type == Step.STEP_TYPE_NOM:
             count_work = OperationWproduct.objects.filter(operation=obj).count()
         else:
-            count_work = OperationMaterial.objects.filter(operation=obj).annotate(count_work=Sum('count'))
-            print(count_work)
+            count_work = OperationMaterial.objects.filter(operation=obj).aggregate(count_work=Sum('count'))['count_work']
         return count_work
     
     def get_equip_(self, obj):