Suppose a TV was manufactured 5 years ago in 2013, and it had a market value of 50,000. However, demand for TVs was very low and so it was left unsold.
Now, in 2018, it is sold for a market price of 80,000. What amount is added to the GDP of the economy in 2013 with respect to this single TV?
50,000
The market of the TV in 2013 is to be added to that year's GDP. So, 50,000 is the answer.