Charlie wants to go on the class trip to Washington, DC. Each student needs to pay for part of the trip. He almost has enough in his savings account. He is wondering if he will have enough with the interest he makes over the next six months. What should Charlie do? He should try to spend less and put whatever he can in a safe place.

He should set aside $10 per month to put in his savings account.

He should wait and hope that he has enough.

He should become more knowledgeable about the interest rate and learn how to calculate what his balance will be in six months.