More than average: $$(92.5-91)\times24=36$$.  Each boy should have $$36\div18=2$$ dollars less than the average, so each of them has $91-2=89$ dollars. 
The average pocket money of the whole class is $91$ dollars. Each of the $24$ girls in the class has $92.5$ dollars on average. There are $18$ boys in the class, and their average pocket money is~\uline{~~~~~~~~~~}~dollars. 
Options:
[A] $$36$$ 
[B] $$28$$ 
[C] $$69$$ 
[D] $$85$$ 
[E] $$89$$ 