The Public Debt for the Economy Is
A) $540 Billion

$$\begin{array} { | l | c | } \hline \text { Security } & \text { Amount (in Billions) } \\\hline \text { Treasury Bills } & \$ 220 \\\hline \text { Corporate Bonds } & 140 \\\hline \text { Treasury Notes } & 80 \\\hline \text { Corporate Stock } & 200 \\\hline \text { US Savings Bonds } & 60 \\\hline \text { Treasury Bonds } & 100 \\\hline\end{array}$$ The public debt for the economy is

A) $540 billion.
B) $400 billion.
C) $580 billion.
D) $460 billion.