\caption{Profit under {\vphantom{q}}boundary equilibrium $\overline {q}{\vphantom{q}}_{{\mathrm{1}}}^{{\mathrm{BE}}}$. Region of {\it{A}}-stability for TSRK methods with $s\equ {\mathrm{1}}$ and $\widetilde {p}\equ q\equ {\mathrm{2}}$.}