A manufacturer finds that the profit P from assembling x bicycles per day is given by

P(x) = -x^2 + 50x - 200

What is the maximum profit?

I figured to find the max profit i should find the turning point of of the parabola which illustrates this equation.

What I got was (25, 1675)

So I figured that it would be $1675

HOWEVER, the answer says 425 dollars!

Could you tell me how to do this?