The term normal goods refers to what kind of goods

Kind of goods that by increasing the income of a person the consumption of goods increases.

Explanation:

On a legal level, those goods that comply with the Normal law of demand are called normal goods, citing that by increasing the income of a person the consumption of goods increases. That is to say, everything normal is that kind of good or service in which demand increases as income increases. Most goods and services usually belong to this category.

Done

previous business sales - c.