We have been given that Broker P charges a commission of $8.50 for every ten shares of stock, and Broker Q charges a fee of $65.00 for every thousand dollars bought or sold.
Let us find commission of each broker to buy 500 shares.



Broker P will charge $ 425 for 500 shares.
Let us find commission for broker Q.


We are told that Broker Q charges a fee of $65.00 for every thousand dollars bought or sold. 9375 is same as 9.375 thousands.
To find broker Q's commission we will multiply 9.375 by 65.

We can see that broker Q is charging more than broker P. Let us find difference of commissions of both brokers.

Therefore, Broker P is the better deal by $184.375.