Too many unknowns to solve the equation. Like, what's in the kit? Showing us a picture of it doesn't tell me what I need to know.
But, here are some guesstimates: Honey is rather variable, but a kilo will probably add about .015 to the gravity of a 23L batch. The brown sugar will add about .004. That's the best I can do, not knowing what the OG would have been without those additions.
"Anything worth doing, is worth doing slowly." ~~ Mae West