Suppose that you earn $52,800 per year. What is your monthly salary? Assume that you deposit 10% of your monthly salary into an investment account with an APR of 4.1% every month for 30 years. We will assume for simplicity that your salary never changes, so you are depositing the same amount every month for 30 years. What will the balance of your investment account be after 30 years?

How much of the investment account balance is interest?