Aadhya finds her textbook almost as soon as she sits down because she's thinking about some designs the void gave her. She opens it.

It seems like the class might be out of date because chapter 1 starts with a sample budget suggesting that the clever housewife might want to teach her children the value of money by starting them with a five cent allowance and reminds her that it's possible to save money by making her own laundry detergent with these common ingredients, but, uh, perhaps the underlying principles are sound.