public ActionResult Index(TipCaculator model)
        {
            model.Tip       = model.MealTotal * (model.TipPercent / 100);
            model.TotalCost = model.Tip + model.MealTotal;

            return(View(model));
        }
        //
        // GET: /Tip/
        public ActionResult Index()
        {
            var model = new TipCaculator();

            return(View(model));
        }