Perfect Complements When two goods are perfect complements, a consumer wants to consume the goods in the same ratio regardless of their relative price. Indifference curves take the form of right angles. In this case, Aaron will choose to consume 4 glasses of milk and 4 cookies (bundle B) regardless of the slope of the budget line passing through B. The reason is that neither an additional glass of milk without an additional cookie (bundle A) nor an additional cookie without an additional glass of milk (bundle C) adds to his total utility.