 And like the changing of the seasons and the time and my beard, we move into our next Excel tutorial. Now the big thing I want to point out is this chapter, this week, is actually probably the hardest, hardest chapter of this entire class. And you might notice this is actually one of the first times that we've only had one tutorial. Well, why? Well, if you take a look into this chapter, you're going to notice that what we learned this time is we really dive deep into utilizing those formulas and those functions. Those are the powerful tools of Excel. And with those, we really can do some powerful things. One of the things that we're going to dive a little deeper on is something like the sum formula, the structure of the sum formula. And then we'll get into some crazy stuff like the lookup, which is a little bit more complex than it sounds like, but I'm sure you guys will get it.