Given the Following Data, What Is Cost of Goods Sold

Given the following data, what is cost of goods sold? $\begin{array} { | l | r | } \hline \text { Sales revenue } & \$ 950,000 \\\hline \text { Beginning inventory } & 150,000 \\\hline \text { Ending inventory } & 230,000 \\\hline \text { Purchases } & 720,000 \\\hline\end{array}$

A) $870,000
B) $640,000
C) $570,000
D) $510,000