Freight Class calculation

gistfile1.cs

        private static FreightClassType getFreightClass(double density) {
            if (density < 1) {
                return FreightClassType.CLASS_500;
            } else if (density >= 1 && density < 2) {
                return FreightClassType.CLASS_400;
            } else if (density >= 2 && density < 3) {
                return FreightClassType.CLASS_300;
            } else if (density >= 3 && density < 4) {
                return FreightClassType.CLASS_250;
            } else if (density >= 4 && density < 5) {
                return FreightClassType.CLASS_200;
            } else if (density >= 5 && density < 6) {
                return FreightClassType.CLASS_175;
            } else if (density >= 6 && density < 7) {
                return FreightClassType.CLASS_150;
            } else if (density >= 7 && density < 8) {
                return FreightClassType.CLASS_125;
            } else if (density >= 8 && density < 9) {
                return FreightClassType.CLASS_110;
            } else if (density >= 9 && density < 10.5) {
                return FreightClassType.CLASS_100;
            } else if (density >= 10.5 && density < 12) {
                return FreightClassType.CLASS_092_5;
            } else if (density >= 12 && density < 13.5) {
                return FreightClassType.CLASS_085;
            } else if (density >= 13.5 && density < 15) {
                return FreightClassType.CLASS_077_5;
            } else if (density >= 15 && density < 22.5) {
                return FreightClassType.CLASS_070;
            } else if (density >= 22.5 && density < 30) {
                return FreightClassType.CLASS_065;
            } else if (density >= 30 && density < 35) {
                return FreightClassType.CLASS_055;
            } else {
                return FreightClassType.CLASS_050;
            }
        }