internal void RemoveAirlineStats(int firstDay, int lastDay)
{
GrossProfit.RemoveStats(firstDay, lastDay);
OperatingProfit.RemoveStats(firstDay, lastDay);
NetProfit.RemoveStats(firstDay, lastDay);
GrossMargin.RemoveStats(firstDay, lastDay);
OperatingMargin.RemoveStats(firstDay, lastDay);
NetMargin.RemoveStats(firstDay, lastDay);
}
