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Is it possible to make a mathematical symbol being displayed inside a verbatim environment without affecting the other "verbatim" symbols?

For instance if I use:

\begin{Verbatim}[commandchars=\\\{\},
codes={\catcode`$=3\catcode`^=7}]

param rate {PROD, STAGE} > 0;
#rate[p,s] $\equiv r\sb{ps}^i ...