Last week, I posted a video and blogpost in response to a challenge from Mr. Excel .  And this week, Mr. Excel has collected viewers’ solutions and post a video to summarize different techniques used for solving the same question.  Very informative!  Check it out:

Btw, you have no idea how happy I was when I heard Mr. Excel mentioned my name in his videos many times.  Feeling so honored. 😊  Thank you Bill!