The average 15- year- old purchases 12 CDs and 15 cheese pizzas in a typical year.

The average 15- year- old purchases 12 CDs and 15 cheese pizzas in a typical year. If cheese pizzas are inferior goods, would the average 15- year- old be indifferent between receiving a $ 30 gift certificate at a local music store and $ 30 in cash? Explain.