The optimization model is:
\begin{align_}
\text{Maximize} \quad & P = 4x + 9y \\
\text{subject to} \quad & 0.3x + 1.2y \leq 40 \\
& x \geq 30 \\
& y \geq 10 \\
& 0.2x + 0.5y \leq 15 \\
& \frac{x}{5} + y \leq 30 \\
& x, y \geq 0
\end{align_}
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