There is no outcome where those deaths don't happen. Their deaths are inevitable. Hitting the switch changes absolutely nothing about that fact. This is actually one of the least culpable you would be in the death(s) resulting from of any trolley thought problem I've ever seen.

The bigger question is why you are even concerned with the 100 dollars in light of the gory massacre you're about to witness. Even if you can't do anything, you should want to. Or at the very least, the people should be your entire focus. Ignoring it entirely to strategize about profiting less than 2 days worth of minimum wage pay out of the situation... That's some psycho shit. You'll be a great fit at Palantir.