> How much was spent on Russia, Russia, Russia?
A lot, and it produced a lot of results. Because there very much was a there there.
> Still somehow no charges.
In the criminal investigation (the only ones that can produce charges) there were numerous individuals and entities charged in (or in at least one case, in a handoff from) the Mueller investigations, including 25 Russian nationals and 3 Russian companies.
Of course, many acts involved in foreign interference are not within the scope of criminal law, and much of the investigatory energy outside of the criminal investigation (e.g., the Senate investigation producing the bipartisan report on Russian interference) was not directed at criminal law particularly.