I'll give it a shot...
Touchdown counts as B's live ball foul and A's USC do not offset. A first has the choice of enforcement of B's illegal block on the try on the kickoff. The USC for high stepping will be enforced on the kickoff. If A chooses enforcement on the try, the try will be from the 1 1/2 yard line and the ensuing kickoff will be from K's 25. If A chooses enforcement on the kickoff, they will kick from the K 35. (Enforce 10 yards against B/R for the low block, then move back 15 for the USC.)
Just looked it up. B would also have a choice of enforcement of the USC on the try or on the kickoff.