//returns the discount factor for a manufactorer for an airline and for a period
public static double GetAirlineManufactorerDiscountFactor(Airline airline, int length, Boolean forReputation)
{
double score = 0;
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;
}