Total revenue: $40\times 7+50\times 6+10\times 15=730$ dollars  A bag of assorted candy: $$730\div 100=7.3$$ dollars 
A bag of toffee is $7$ dollars, a bag of cotton candy is $6$ dollars, and a bag of orange candy is $15$ dollars. Now, the candy shop decides to mix $40$ bags of toffee, $50$ bags of cotton candy, and $10$ bags of orange candy for $100$ bags of assorted candy. What should be the price of the assorted candy in dollars to keep the total revenue unchanged? 

a. $$7.3$$ 
b. $$8$$ 
c. $$9.5$$ 
d. $$10$$ 
e. $$12$$ 