Mr. Bilbao is planning to save and invest $3500 per month for the next 30 years and he expects to earn an EAR of 12% on his investment. He expects an expenditure of $50,000 at the end of the 20th year. After 30 years, Mr. Bilbao will put his accumulated wealth in a bank that promises an APR of 6%. He expects to live for 25 years after retirement. He expects one major international trip in the 15th year of his retirement and the trip will cost $100,000. He does not wish to leave any bequest. 

How much money will Mr. Bilbao be able to withdraw every month during his retirement years if he withdraws the same amount every month ?