diff --git a/hb_server/apps/sam/serializers.py b/hb_server/apps/sam/serializers.py
index b28a913..e4ce902 100644
--- a/hb_server/apps/sam/serializers.py
+++ b/hb_server/apps/sam/serializers.py
@@ -75,6 +75,7 @@ class SaleCreateSerializer(serializers.ModelSerializer):
     @transaction.atomic
     def create(self, validated_data):
         iproducts = validated_data.pop('iproducts')
+        validated_data['count'] = len(iproducts)
         sale = Sale.objects.create(**validated_data)
         i_l = []
         for i in iproducts: