The Table Given Below Shows the Real GDP, Aggregate Expenditures

The table given below shows the real GDP, aggregate expenditures, saving, and imports of an economy.
Table 10.4
$\begin{array}{|c|c|c|c|}\hline \text { Real GDP } & \begin{array}{c}\text { Aggregate } \\\text { Expenditures }\end{array} & \text { Saving } & \text { Imports } \\\hline \$ 0 & \$ 800 & -\$ 300 & \$ 50 \\\$ 1,000 & \$ 1,600 & -\$ 200 & \$ 150 \\\$ 2,000 & \$ 2,400 & -\$ 100 & \$ 250 \\\$ 3,000 & \$ 3,200 & \$ 0 & \$ 350 \\\$ 4,000 & \$ 4,000 & \$ 100 & \$ 450 \\\$ 5,000 & \$ 4,800 & \$ 200 & \$ 550 \\\$ 6,000 & \$ 5,600 & \$ 300 & \$ 650 \\\hline\end{array}$
-Refer to Table 10.4. Suppose the economy is currently in equilibrium and the potential GDP of the economy is $6,000. The current GDP gap equals _____.

A) $400
B) $1,000
C) $2,000
D) $3,000
E) $6,000