Your parents asked you to go to Cebeco to pay your monthly electricity bill. The electric bill cost Php 1,500.00 but when you opened the envelope there were four Php 500.00 bills. Surely, your parents did not notice it because they are in a hurry for they were late for work. When you met that evening, your parents asked you if you paid the bill without asking for the change. What will you do? Why?