in a typical real estate transation, a broker must split the commision with the another broker and then once again with thier own brokerage firm. After all splits, the listing broker may expect to recieve how much in commision following the closing of a residential property having sold for $600,000 with a stated commision fee of 6%?

a. $9,000

b. $4,500

c. $36,000

d. $