public OrderProcessing(OrderClass OrderObject, double price) { if (OrderObject.getCardNo() > 7000 || OrderObject.getCardNo() < 5000) { set_card_is_valid(false); } else { set_card_is_valid(true); } //calculate total amount of charge = unitPrice*numOfRooms + Tax + LocationCharge double num = price * OrderObject.getamount() + .075 + 2; set_total_charge(num); }