Why is bargain often the most expensive

Extra time must be spent in training or correcting mistakes. The bargain help is often the most expensive because,
1)- The physicians shall pay additional taxes for bargain help
2)- more benefits are given to bargain help
3)- extra time must be spent in training.
4)- bargain helps makes the most efficient medical assistant

The lungs are the bags that hold air as it is inhaled oxygen gas that is in the air moved into the blood-and the heart pumps to move this oxygenated blood to cells in the body that need energy