Given a pool of 30 year fully-amortizing FRMs making monthly payments to investors with the following characteristics:
WAC: 6%
Pass-through rate: 5.5%
Prepayment assumption: 200 PSA
Loans were not seasoned before entering pool
This MBS has been active for a few years in collecting payments from borrowers and making payments to investors.
It's currently month 26 in the pool.(t=26)
Starting pool balance month in month 26: 72,534,232
What is the dollar amount of prepayment in month 26 and the starting pool balance for month 27 of this security.