1. https://youtu.be/x-hYzRncxTc

Watch the two videoes and answer: What was the Opportunity Cost of buying the Xbox?
2. https://youtu.be/vpnxd31y0Fo

Watch these two videos and answer: What were the two sunk cost fallacies described in this video? Were they truly fallacies? Explain your answer.
3. https://youtu.be/_rk2hPrEnk8
Watch the video and answer: In the chicken sandwich video, explain how there were so many economies of scale with respect to salt.
4. https://youtu.be/vv1mFAMz0PE
Watch the video and answer:  Consider the Tesla Gigafactory video. Describe an example each of 1) an economy of SCALE and 2) an economy of scope.

Each of them just need several sentences to answer.  One page in total should be enough.