TheAirline.Models.Airlines.Airline.GetReputation C# (CSharp) Method

        public AirlineValue GetReputation()
        {
            //0-100 with 0-10 as very_low, 11-30 as low, 31-70 as normal, 71-90 as high,91-100 as very_high
            if (Reputation < 11)
            {
                return AirlineValue.VeryLow;
            }
            if (Reputation > 10 && Reputation < 31)
            {
                return AirlineValue.Low;
            }
            if (Reputation > 30 && Reputation < 71)
            {
                return AirlineValue.Normal;
            }
            if (Reputation > 70 && Reputation < 91)
            {
                return AirlineValue.High;
            }
            if (Reputation > 90)
            {
                return AirlineValue.VeryHigh;
            }
            return AirlineValue.Normal;
        }

        //returns the discount factor for a manufactorer for an airline and for a period
        public static double GetAirlineManufactorerDiscountFactor(Airline airline, int length, bool forReputation)
        {
            double score;

            if (forReputation)
                score = 0.3*(1 + (int) airline.GetReputation());
            else
                score = 0.005*(1 + (int) airline.GetValue());

            double discountFactor = (Convert.ToDouble(length)/20) + (score);
            double discount = Math.Pow(discountFactor, 5);

            if (discount > 30)
                discount = length*3;

            return discount;
        }