The upshot of it all was that Professor Umbridge spent her first afternoon as Headmistress running all over the school answering the summonses of the other teachers, none of whom seemed able to rid their rooms of the fireworks without her.
There are no more uses of "upshot" in the book.
Show samples from other sources
The upshot was that a series of urgent messages were dispatched to me through the Canadian Consul in Chile, instructing me to report to Ottawa at once.
Farley Mowat -- Never Cry Wolf
The upshot was this: it was true that the Squire Semelan controlled this little town and all the land around it, but Semelan owed fealty directly to Greyfallow.