consider a football game. You buy a ticket for $20 for a football game. As you approach the stadium scalpers offer you $50 for your ticket they can sell them to rabid fans for more than $50. You value going to the game more than $20 but less than $50. You should:

a Go to the game because the benefit of going to the game is more than $20.

b Sell the ticket for $50 and go home.

c Go to the game because the tickets cost only $20.

d Keep the ticket and go home because you only spent $20.