A $\$ 122,000$ Trust Is to Be Invested in Bonds Paying $6 \%$

A $\$ 122,000$ trust is to be invested in bonds paying $6 \%$ , CDs paying $5 \%$ , and mortgages paying $8 \%$ . The sum of the investments in bonds and CDs must equal the mortgage investment. To earn $\$ 8400$ annual income from the investments, how much should the bank invest in bonds?

A) $\$ 47,000$
B) $\$ 14,000$
C) $\$ 45,000$
D) $\$ 61,000$