Budget + Marketing = Combined For Box Office Success - Why?

[SethRex]

I want you to treat me like an idiot. Treat me like an uneducated dolt who doesn't know anything about the movie money making business.

So explain to me why you have the movie's main budget (For example the Ghostbusters' 144 million) and then for some reason, you include the advertising budget, which in my honest opinion, while it is used to advertise the film, should not be included in the film's overall success rate, yet still it somehow is.

So explain to me why that is.

*And yes, only for this thread, you can call me, and only me, an idiot....cause I said so, okay mods?