serializer json fast food

public static string ExportOrdersByEmployee(FastFoodDbContext context, string employeeName, string orderType)
        {
            var type = Enum.Parse<OrderType>(orderType);

            var employee = context.Employees.ToArray()
                .Where(x => x.Name == employeeName)
                .Select(z =>new
                    {
                        z.Name,
                        Orders = z.Orders.Where(o => o.Type == type).Select(o => new
                            {
                                o.Customer,
                                Items = o.OrderItems.Select(oi => new
                                {
                                    oi.Item.Name,
                                    oi.Item.Price,
                                    oi.Quantity
                                }).ToArray(),
                                TotalPrice = o.OrderItems.Sum(oi => oi.Item.Price * oi.Quantity)
                            })
                            .OrderByDescending(o => o.TotalPrice)
                            .ThenByDescending(o => o.Items.Length)
                            .ToArray(),
                        TotalMade = z.Orders
                            .Where(o => o.Type == type)
                            .Sum(o => o.OrderItems.Sum(oi => oi.Item.Price * oi.Quantity))
                })
                .SingleOrDefault();

            string result = JsonConvert.SerializeObject(employee,Formatting.Indented);

            return result;
        }