Cookies and Milk

The Perfect Pair

A Good Snack

If demand for chocolate chip cookies goes up, the demand for milk will also be likely to go up. Milk and cookies are related goods and milk is a good compliment to cookies. Therefore, people will usually buy milk if they buy cookies.

Sugar Cookie Prices Decrease

Sugar cookies and chocolate chip cookies are related goods. Sugar cookies are a substitute for chocolate chip cookies. So, if sugar cookies go on sale, the demand for chocolate chip cookies will decrease because they are more expensive and sugar cookies are a good substitute.