public class BatteryCharger {

	private int [] rateTable = {50,60,160,60,80,100,100,120,150,150,150,200,40,140,220,220,200,200,180,180,140,100,80,60};
	
	int getChargingCost(int startHour, int chargeTime)
	{
		//assume chargeTime > 0 and startHour is 0 to 23, inclusive
		
	}
	
	 int getChargeStartTime(int chargeTime)
	{
		
	}
}