(Table 1: Macroeconomic Data for Econia) Table 1 Provides Several

(Table 1: Macroeconomic Data for Econia) Table 1 provides several statistics on Econia's economy in 2018. Use the data to determine the level of national saving in Econia during 2018.
$\begin{array}{l}\text { Table 1: Macroeconomic Data for Econia, } 2018 \text { (billions of dollars) }\\\begin{array}{|c|c|c|c|c|c|c|c|}\hline \text { GDP } & \mathrm{C} & \mathrm{I} & \mathrm{G} & \mathrm{Ex} & \mathrm{Im} & \mathrm{T} & \text { Depreciation } \\\hline \$ 900 & \$ 600 & \$ 200 & \$ 300 & \$ 100 & \$ 300 & \$ 250 & \$ 50 \\\hline\end{array}\end{array}$

A) $50 billion
B) $350 billion
C) $0
D) $200 billion