What is the principal portion of the 188th months payment for a $450,000 15/15 Hybrid ARM Mortgage (first 15 years are fixed rate and second 15 years are adjustable all payments are fully amortizing) with the following parameters:

Fixed Interest Rate: 5.5%

1^st Year of ARM portion - LIBOR Index: 1.85%

2^nd Year of ARM portion - LIBOR Increase: 1.45%

Margin: 275 basis points

Annual Periodic Cap: 2%

Lifetime Cap: 5%