Madelyn: I want a Tartan shirt.
Michael: If you give me 15 dollars, I will ensure you have the future opportunity to obtain a Tartan shirt.
Greg: For another 15 dollars?
Madelyn: I want a Tartan shirt.
Michael: If you give me 15 dollars, I will ensure you have the future opportunity to obtain a Tartan shirt.
Greg: For another 15 dollars?