Instead of paying Php 100,000.00 in annual rent for office space at the beginning of each year for the next 10 years, an engineering firm has decided to take out a 10-year Php 1,000,000.00 loan for a new building at 6% interest. The firm will invest Php 100,000.00 of the rent saved and earn 18% annual interest on that amount. What will be the difference between the firm's annual revenue and expenses?

Answer: Php 10, 177.32