To find out how much money Jennifer will make after selling 25 cupcakes, we can substitute \( c = 25 \) into the profit function \( P(c) = 1.50c - 9.96 \).
Calculating \( P(25) \):
\[ P(25) = 1.50(25) - 9.96 \]
Now, we compute \( 1.50 \times 25 \):
\[ 1.50 \times 25 = 37.50 \]
Next, substitute this value back into the profit function:
\[ P(25) = 37.50 - 9.96 \]
Now, we subtract \( 9.96 \) from \( 37.50 \):
\[ P(25) = 37.50 - 9.96 = 27.54 \]
Thus, the profit Jennifer makes after selling 25 cupcakes is
\[ \boxed{27.54} \]