The Table Given Below Shows the Levels of National Income

The table given below shows the levels of national income (Y) and the corresponding levels of saving (S) , investment (I) , export (X) , and import (M) of an open economy.
Table 10.2
$\begin{array}{l}\begin{array}{|c|c|c|c|c|c|}\hline \boldsymbol{Y} & \boldsymbol{S} & \boldsymbol{I} & \boldsymbol{G} & \boldsymbol{X} & \boldsymbol{M} \\\hline \$ 935 & -\$ 250 & \$ 320 & \$ 40 & \$ 170 & \$ 100 \\\$ 2,100 & \$ 0 & \$ 320 & \$ 140 & \$ 170 & \$ 130 \\\$ 3,320 & \$ 250 & \$ 320 & \$ 200 & \$ 200 & \$ 350 \\\$ 4,800 & \$ 375 & \$ 320 & \$ 240 & \$ 230 & \$ 415 \\\$ 5,230 & \$ 650 & \$ 320 & \$ 320 & \$ 250 & \$ 590 \\\$ 6,300 & \$ 825 & \$ 320 & \$ 340 & \$ 270 & \$ 610 \\\hline\end{array}\\\text { Taxes equal zero }\end{array}$
-Consider the economy described in Table 10.2. What is the equilibrium level of real GDP?

A) $935
B) $2,100
C) $3,320
D) $4,800
E) $5,230