Balance The Books
From Vanishing Point Wiki
SPOILER
The colored squares match the colors of Monopoly money. $500-$50-$10-$20-$100=$320. The clue is "INVEST THEN COLLECT," so I played with buying various properties and collecting rent until I found the match. Spend the $320 to buy Connecticut Avenue for $120 and four houses for $50 each. The rent is $450, and "450" is the answer.
{posted by Shad0 on the Unfiction forum}
SPOILER
The $320 collected on rent can buy you Pennsylvania Avenue, which when you add two houses (two are shown next to the symbol [1] on the Brandenburg Gate) gets you a new rent of $450. "450" is the answer.
Next book: Disco Inferno
![[1]](http://vanishingpointwiki.com/wiki/Image:Projections_Berlin.jpg){kind=link}