A CMO has been issued with 3 tranches and a residual. At origination:

- Tranche A investors own $106 million of principal with a coupon rate of 3.50%.

Tranche B investors own $33 million of principal with a coupon rate of 3.70%. -

Tranche Z investors own $13 million of principal with a coupon rate of 4.50%.

The residual carries $1 million and receives all residual payments. Mortgages backing the security issued are fully amortizing fixed rate with mortgage rate of 4.50% with 30 year maturities and monthly payments. Assume no servicing/guarantee fee and no prepayments.

What is the ending balance on the B-tranche at the end of the first month (same as the beginning balance in the second month)? Round your answers to two decimal points.