11. According to the "Personal Income Tax Law of the People's Republic of China," citizens do not need to pay tax on the portion of their monthly salary and wages that does not exceed 800 yuan. The portion exceeding 800 yuan is the monthly taxable income, which is taxed according to the following table in segments:
\begin{tabular}{|c|c|}
\hline Monthly taxable income & Tax rate \\
\hline The portion not exceeding 500 yuan & $5 \%$ \\
\hline The portion exceeding 500 yuan to 2000 yuan & $10 \%$ \\
\hline The portion exceeding 2000 yuan to 5000 yuan & $15 \%$ \\
\hline$\ldots .$. & $\ldots .$. \\
\hline
\end{tabular}

A person's tax for January is 30 yuan. Then his monthly salary and wages for that month are $\qquad$ yuan.