Sales orders works correctly now.

src/clj/auto_ap/graphql.clj

@@ -220,6 +220,8 @@
               :tip {:type :money}
               :tax {:type :money}
               :discount {:type :money}
+              :service_charge {:type :money}
+              :returns {:type :money}
               :client {:type :client}
               :date {:type 'String}
               :charges {:type '(list :charge)}