Each month (30 days) has 43200 minutes (30 * 24 * 60), and each song is about 4 minutes long, give or take. I could only listen to about 10,000 songs if that's all I did 24/7. But, you know, I sleep, I talk to people, I read, I work. So my music listening accounts for a much smaller part of my day. Maybe 4 hours worth (but in reality, much less because I tend to spend more time listening to podcasts). So I listen to 10-15 songs a day. I'm not a teenager, but even a teenager has to turn the music off at school.
So, yeah, math...
The Z-80 instruction set. (TRS-80 nerd in the house.)
This [PDF] still sits on my bookshelf.
Inflation counts for some of that. It's important to know what baseline dollar value is.
Also, property values in CA rose faster than other areas in the country.
No hardware designer should be allowed to produce any piece of hardware until three software guys have signed off for it. -- Andy Tanenbaum