Table 12-28 -Refer to Table 12-28

Table 12-28
$\begin{array}{|l|c|} \hline & \begin{array}{c}\text { Billions of } \\\text { Dollars }\end{array} \\\hline \text { GDP } & \$ 5,250 \\\hline \text { Transfer Payments } & 50 \\\hline \text { Retained earnings } & 700 \\\hline \text { Depreciation } & 1,250 \\\hline\end{array}$
-Refer to Table 12-28.Based on the table above,what is national income for this economy?

A) $4,700 billion
B) $4,000 billion
C) $3,150 billion
D) $2,450 billion