Ho plans to retire in 40 years and the duration of his retirement is expected to be 30 years. His current spending is $15,000 per month. If he wants to maintain his current lifestyle by spending the same amount in real terms during his retirement, how much does he need to save every month in real terms? Assume he can earn a nominal APR of 12% (compounded monthly), and the inflation rate (expressed as monthly compounded APR) is 3%. Correct your answer in nearest integer.