Gymnast Clothing manufactures expensive soccer cleats for sale to college bookstores in runs of up to 500. Its cost (in dollars) for a run of x pairs of cleats is

C(x)=3150+5 x+0.1 x^{2} \quad(0 \leq x \leq 500) C(x) = 3150 + 5x + 0.1x2(0 sxs 500).Gymnast Clothing sells the cleats at $100 per pair. Find the revenue and profit functions. How many should Gymnast Clothing manufacture to make a profit?