Ram has just sold his share in a company and decided to buy a new car for his wife. On 15 April 2019, Ram appointed Gan as his agent to buy a car at the price not exceeding RM 75,000. The next day, Gan went to see Song, a car dealer and booked a car at the price of RM 85,000 and paid the deposit of RM 8,500. Gan told Song that the car was meant for Ram's personal use. Song gave Gan RM 500 as a commission for booking the car with him. One month after the booking date, Song sent the car to Ram and claimed for the balance purchase price of the car. Ram told Song that he has never authorized Gan to purchase the car at that price and refused to accept the car.

My Question : "Song gave Gan RM 500 as a commission for booking the car with him" how to do discussion for this part, and please also explain in details for me because im really bad in business law. thank you in advance