Four years from now, Tim and Justine plan to take a year's leave of absence from their jobs and travel through Asia, Europe, and Africa. They want to accumulate enough savings during the next four years so they can withdraw $3000 at each month-end for the entire year of leave. What amount must they pay into the fund at the end of every calendar quarter for the next four years to reach their goal? The planning assumptions are that their savings will earn 4% compounded quarterly for the next four years and 3% compounded monthly during the fifth year.