Hrm. Second playthrough, 15 more minutes, mapped out behind some of the locked doors. Seems like getting to $80K is going to take some serious optimization.
Let’s see. You have 120 moves. If you don’t use the sack, then placing 28 items would give you 28 * 29 * 100 = $81200. But that would give you only 4 moves per item, with 8 left over. Even though dropping multiple items only uses a single turn, you’d have to have damn near perfect routing for that. It would be perfectly possible to design the game with a perfect route and then throw in 22 red herrings, but finding the solution seems like it would be hard.
If you place 24 items, you get 24 * 25 * 100 = $60k. That gives 5 moves per item exactly, and then you hope for 10-12 high-value items in the $1600-2000 range? That sounds more reasonable.
At 20 items, you get $42K and 6 moves per item, which seems doable, but you’d need your items to sell for an average of $2K each. I haven’t opened any of the cases yet, so maybe there are some really expensive items and that’s reasonable.
OK, time to stop playing with numbers and get back to the game.