B.O.B cool/favorite parts

During this unit I personally thought the very last part with price and cost was cool and I liked it.  This is because now when I think of toys I can think even further into what goes into making the price and how it would benefit a company. Although I haven't come upon a real life situation yet I am hoping I will.  Also I thought that solving formulas for one variable was quite interesting because I can see this also being used in the real world.