public int howMuch(String[] arrival, String[] departure, int wage){
		double answer = 0;
		try{			
			for(int i = 0;i < arrival.length;i++){
				answer += duration(arrival[i], departure[i], wage);
				System.out.println("answer "+answer);
			}
			
			return (int)answer;
		}catch(Exception e){
			System.out.println("Exception");
		}finally{
			return (int)answer;
		}
	}