summary on relevant vs irrelevant costs for decision making misc decision making issues

by

please watch the three videos below and write a three to four paragraphs summarizing the contents of the videos. the paragraphs do not have to correlate with each other nor need to be in a specif format, just summarize what the videos are saying. Thank you.

https://www.youtube.com/watch?v=z1n2bX_VkuM

https://www.youtube.com/watch?v=Rap9zd6JT0A

https://www.youtube.com/watch?v=jf9GmiWLWBE&list=PLxP0KZzCGFYP0KHkWvqCF03vAQKygcLFc