The document calculates the return on investment for installing RFID machines on 50 buses. It estimates annual maintenance costs of PHP 50,000 and profit income of PHP 2.19 million in the first two years from card sales. In years 3-5, income is expected to decrease by 50% as most commuters have cards. Total profit over 5 years is PHP 3.5 million, yielding an estimated return on investment of 18.48%.