Acheron Co$.\text{'}$s December $31,$ Year $1,$ balance sheet contained the following items in the long$-$term liabilities section:

Unsecured

$5\mathrm{.}375\%$ registered bonds $($ $$25,000$ maturing annually beginning in Year $4)$ $$550,000$

$6\mathrm{.}5\%$ convertible bonds, callable beginning in Year $10,$ due Year $21$ $$225,000$

Secured

$4\mathrm{.}875\%$ guaranty security bonds, due Year $21$

$$500,000$

$5\mathrm{.}0\%$ commodity$-$backed bonds

$($ $$50,000$ maturing annually beginning in Year $5)$

$$150,000$

What are the total amounts of term bonds and debenture bonds?

$)$