diff --git a/kfet/views.py b/kfet/views.py
index 7129ceec..f344c413 100644
--- a/kfet/views.py
+++ b/kfet/views.py
@@ -864,30 +864,29 @@ def kpsul_checkout_data(request):
     if not pk:
         pk = 0
 
-    checkout = get_object_or_404(Checkout, pk=pk)
-    data = {
-        'id': checkout.id, 'name': checkout.name, 'balance': checkout.balance,
-        'valid_from': checkout.valid_from, 'valid_to': checkout.valid_to
-    }
-
-    try:
-        last_statement = (
-            CheckoutStatement
-            .objects
-            .select_related('by', 'by__profile', 'by__profile__user')
-            .filter(checkout=checkout)
-            .latest('at')
-        )
-        data['last_statement_balance'] = last_statement.balance_new
-        data['last_statement_at'] = last_statement.at
-        data['last_statement_by_trigramme'] = last_statement.by.trigramme
-        data['last_statement_by_last_name'] = \
-            last_statement.by.profile.user.last_name
-        data['last_statement_by_first_name'] = \
-            last_statement.by.profile.user.first_name
-    except CheckoutStatement.DoesNotExist:
-        pass
-
+    data = (
+        Checkout.objects
+        .annotate(
+            last_statement_by_first_name=F('statements__by__profile__user__first_name'),
+            last_statement_by_last_name=F('statements__by__profile__user__last_name'),
+            last_statement_by_trigramme=F('statements__by__trigramme'),
+            last_statement_balance=F('statements__balance_new'),
+            last_statement_at=F('statements__at'))
+        .select_related(
+            'statements'
+            'statements__by',
+            'statements__by__profile__user')
+        .filter(pk=pk)
+        .order_by('statements__at')
+        .values(
+            'id', 'name', 'balance', 'valid_from', 'valid_to',
+            'last_statement_balance', 'last_statement_at',
+            'last_statement_by_trigramme', 'last_statement_by_last_name',
+            'last_statement_by_first_name')
+        .last()
+    )
+    if data is None:
+        raise Http404
     return JsonResponse(data)