\[\boxed{\mathbf{167.}}\]
\[300 + 200 = 500\]
\[500 + 300 = 800\]
\[200 + 400 = 600\]
\[400 - 300 = 100\]
\[700 - 400 = 300\]
\[800 - 500 = 300\]
\[500 + 200 = 700\]
\[900 - 600 = 300\]
\[300 + 400 = 700\]
\[600 - 500 = 100\]
\[400 + 400 = 800\]
\[800 - 600 = 200\]