Due to $,$ every incurs a trade$-$off, and that trade$-$off is measured by As in Sheldon's predicament, he is faced with the decision to purchase either a PlayStation or an Xbox. The opportunity cost of the PlayStation are the benefits of the Xbox; while the opportunity cost of the Xbox are the benefits of the Playstation. Sheldon is finding it difficult to make the decision because of two reasons: first, he feels that choosing the correct game system is very important, and second, both game systems have many advantages. Consequently, the opportunity cost of this decision is

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