Jimmy took out a 30 year fixed home mortgage for $400,000 five years ago with a rate of 5.5% APR with monthly compounding. He can get a new loan at 4% APR compounded monthly if he takes $25,000 out of his investment fund that presently earn 8% APR compounded monthly. The $25,000 is needed to reduce the size of the new loan since the value of the home has diminished due to the Great Recession, and also to pay a $500 processing fee. If this new mortgage is a 25 year fixed rate at 4% APR compounded monthly, determine how much Jimmy would save monthly, if any.