public PricingMatrix()
 {
     carrierId = Enums.CarrierDatabaseKey.NONE;
     pricingOptions = new List<KeyValuePair<string, PricingOption>>();
     zoneInfo = new List<Tuple<string, string, int>>();
     pricingType = PricingType.REGULAR;
 }
 public PricingMatrix(Enums.CarrierDatabaseKey carrier_id)
 {
     this.carrierId = carrier_id;
     pricingType = carrier_id == Enums.CarrierDatabaseKey.TOLL ? PricingType.TOLL : PricingType.REGULAR;
     setup();
 }