public ViewResult Index()
        {
            var model = new FixedArrangementCostsViewModel
            {
                FixedArrangementCosts = _services.GetFixedArrangementCosts()
            };

            return(View("Index", model));
        }
 public ViewResult Index(FixedArrangementCostsViewModel model)
 {
     _services.UpdateFixedArrangementCosts(model.FixedArrangementCosts);
     return(View("Index", model));
 }