List<SqlOnlyCostModel> costat = new List<SqlOnlyCostModel>();
        foreach (var QuantityItem in all)

        {
            int maxQtd = all.Max(x => x.QuantityItem);
            decimal maxPrice = all.Max(x => x.UnitPrice);
            string nCurrency = all.Max(x => x.Currency);
            string nCost = all.Max(x => x.Currency);
        }

        _dbEngContext.SaveChanges();
    }