Seems like there's spoilers in the third for the second one, though..

I'd call them call backs rather than spoilers (in spite of playing 3 before 2) but yeah, there are some. Luckily my ADHD will help me forget most if not all of them by the time I finish 3 and start 2 😄

they actually tried to do the math.

Nicely spotted! I had just assumed that they arrived at 800,000 only because it's 10,000 times 80, but you may well be right too!