The function C(x) x3 -15x + 14 gives the cost to manufacture x units of a product. What is the cost to manufacture 900 units?

I assume this is

C(x) = x^3 -15x + 14

So.... the cost to make 900 units is given by

(900)^3 - 15(900) + 14

And I'l let you finish this one....