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. The profit when I produce 3,528 shoes is approximately equal to, or it is equal to, if I produce exactly that many shoes, it's equal to 13.128. Or actually, it's approximately because I'm still rounding. 13.128.