Well, to do that, we just have to input it back into our original profit function right over here. So let's do that. So get my calculator out. So my original profit function is right over there. So I want to be able to see that and that. So I get negative 3.528 to the third power plus 6 times 3.528 squared minus 5 times 3.528 gives me, and we get a drum roll now, gives me a profit of 13.128. So let me write this down.