Calculating Annuities You are planning to save for retirement over the next $30$ years. To do this, you will invest $$850$ per month in a stock account and $$350$ per month in a bond account. The return of the stock account is expected to be $10$ percent per year, and the bond account will earn $6$ percent per year. When you retire, you will combine your money into an account with an annual return of $7$ percent. How much can you withdraw each month from your account assuming a $25-$year withdrawal period?