As the price of the cheap staple rises, they can no longer afford to supplement their diet with better foods, and must consume more of the staple food.
When the price of this inferior good increases by a certain amount, they can no longer afford to buy the more expensive good.
When the price of this inferior good increases by a certain amount, they can no longer afford to buy the more expensive good.
Change to simpler wording: As the price of the cheap staple rises, they can no longer afford to supplement their diet with better foods, and must consume more of the staple food. Output: