$x_A$ is the number of goods A, $x_B$ is the number of goods B and $x_C$ is the number of goods C. The unit price for good A is 50, the unit price for good B is 60, and the unit price for good C is 3. 2-a) Print the profit function. 2-b) The producer must absolutely produce at least 5 $x_C$ in order to be able to produce the goods $x_A$ or $x_B$. The production of goods $x_A$, $x_B$ and $x_C$ have the following constraints: $$ 20 x_A 5 x_B \leqslant 1500 $$