\textbf{176-} The mass of an empty metal container is 300 grams. If we fill this container with a liquid of density $1.2\,\dfrac{\text{g}}{\text{cm}^3}$, the total mass becomes 540 grams, and if we fill it with a type of oil, the total mass becomes 460 grams. The density of this oil is how many grams per liter?
\begin{itemize}
\item[(1)] 950
\item[(2)] 900
\item[(3)] 850
\item[(4)] 800
\end{itemize}