So I noticed that there are a lot of different posters that can appear on Cam 3 and that gave me the question: How many different variations of Cam 3 are there?
As far as I know there are 8 different posters for the left and 12 for the right. Each of the 8 posters on the left have 12 posters on the right that can go with them and the other way around for the right posters. Meaning we have to do 8x12 giving us 96. Then we have to double it for the right posters bringing us to 192.
There are 4 posters that each side shares: Rick, Stars, Carl's Notes, and Sued. Since they're on both sides they can't appear with themselves meaning we have to take away 4 from the total, making the total 188.
I could stop there but you also have to remember that the posters can change while Chica or Freddy are in that room. So we have to times our 188 by how many different variations the girls can be in, in that room.
There are 5 variations the girls can be in, in that room: Empty Room, Chica standing, Chica against the wall, Freddy, and Freddy and Chica. So timesing our 188 poster variations by our 5 girls variations gives us:
940 different variations of Cam 3.
Let me know if I got my math wrong.