A small business sells custom-made T-shirts and hoodies. The profit from each T-shirt sold is $\$8$, and the profit from each hoodie sold is $\$15$. The business also incurs a fixed monthly operating cost of $\$300$. If $t$ represents the number of T-shirts sold and $h$ represents the number of hoodies sold in a month, which equation correctly expresses the business's net profit $P$ for that month?