$(5 + 1 + 8) \times (5 +1) = 84$ 
Brandon is engaging sprint race on the track. He is in the fifth place now, and there are $8$ players behind him. There are $5$ extra groups signing up for sprint race, and the number of players of each group are idential. How many sprint players are there in total? 
Options:
[1] $$65$$ 
[2] $$70$$ 
[3] $$78$$ 
[4] $$84$$ 
[5] $$96$$ 