opportunity costs
Pop
That is called a shortage of the product. A shortage happens whenever the demand (number of people wanting a product) is greater than the supply (quantity of available product).
product trade offs( Nova Net)
Yes, buy purchasing a product called 'Play TV'.
Consumer demand
trade-offs
opportunity costs
i buy a game called the farming-simulator 2011 and i need a product key to play it.
You can buy the product called Proactiv soulution. It works extremely well.
That's called an 'embargo'.
Prouduct Trade-Offs (NovaNet)