Billing: Calculate prices

Elwig/Helpers/AppDbUpdater.cs

@@ -689,7 +689,7 @@ namespace Elwig.Helpers {
                 BEGIN
                     INSERT INTO payment_member (year, avnr, mgnr, net_amount)
                     VALUES (NEW.year, NEW.avnr, (SELECT mgnr FROM delivery WHERE (year, did) = (NEW.year, NEW.did)), NEW.amount)
-                    ON CONFLICT DO UPDATE SET amount = amount + excluded.amount;
+                    ON CONFLICT DO UPDATE SET net_amount = net_amount + excluded.net_amount;
                 END;
                 """);
             ExecuteNonQuery(cnx, """