public IActionResult Upload(IFormFile file)
        {
            List <MenuJson> menus = new List <MenuJson> {
            };
            SumsModel sums        = new SumsModel {
            };

            using (StreamReader r = new StreamReader(file.OpenReadStream()))
            {
                string json = r.ReadToEnd();
                menus = JsonConvert.DeserializeObject <List <MenuJson> >(json);
            }

            sums = _menuBLL.Calculate(menus);

            return(View(sums));
        }