When the mission begins again, load the save point created immediately before escaping from the level. Ignore this message, as your save points and account balance will not be reset.
A message warning that your progress will be lost will appear. Next, press B to return to the first screen, then press Y replay the mission. Any additional money earned from playing the mission the second time will be added to your account balance. Then, escape from the level and the mission review screens will appear displaying your new account balance. Earn as much money as possible and create a save point immediately before escaping from the level. Save the game, then replay that mission again. Successfully complete any mission and earn as little money as possible.