3.3) A rental company purchases a new fleet of motor cars at R20 000 000. Annual maintenance costs equal R50 000, while a profit of R100 000 is made each month by hiring out these motor cars. After 2 years, the motor cars are sold for R6 million. 3.3.1) Calculate the return on investment. 3.3.2) Calculate the payback period. (2) (2)