public static HSShipEstimate ApplyFlatRateShippingOnEstimate(HSShipEstimate estimate, HSOrderWorksheet orderWorksheet)
        {
            var supplierID = orderWorksheet.LineItems.First(li => li.ID == estimate.ShipEstimateItems.FirstOrDefault()?.LineItemID).SupplierID;

            var supplierLineItems            = orderWorksheet.LineItems.Where(li => li.SupplierID == supplierID);
            var supplierSubTotal             = supplierLineItems.Select(li => li.LineSubtotal).Sum();
            var qualifiesForFlatRateShipping = supplierSubTotal > .01M && estimate.ShipMethods.Any(method => method.Name.Contains("GROUND"));

            if (qualifiesForFlatRateShipping)
            {
                estimate.ShipMethods = estimate.ShipMethods
                                       .Where(method => method.Name.Contains("GROUND"))  // flat rate shipping only applies to ground shipping methods
                                       .Select(method => ApplyFlatRateShippingOnShipmethod(method, supplierSubTotal))
                                       .ToList();
            }

            return(estimate);
        }
 public static HSShipEstimate FilterDownFedexShippingRates(HSShipEstimate estimate)
 {
     estimate.ShipMethods = estimate.ShipMethods.Where(method => (method.ID != null && method.ID.Contains("FREE_SHIPPING")) || method?.ID == ShippingConstants.NoRatesID || method?.xp?.Carrier == "USPS" || method.Name == "FEDEX_GROUND" || method.Name == "FEDEX_2_DAY" || method.Name == "STANDARD_OVERNIGHT").ToList();
     return(estimate);
 }