Now that Ishan and Hazel have their saving goal calculated, and rounded up to the nearest dollar, they want to start budgeting to reach that goal. They are 40 years old currently, so they have just 20 years to save up the total they calculated they would require so that they can still reach their goal of retirement by age 60. If they assume the same interest rate, and make deposits into their savings at the beginning of every month, how much would their deposit have to be each month? How much interest will be earned?