suppose a product's profit function is given by pi(q)=-2q^2 900q , where pi(q) is in dollars and q is the number of units sold. (Economists use the symbol pi to represent profit since p is usually used for price. In this context, pi does not represent the number 3.14159 .) Use the marginal profit function to find the approximate profit generated by selling the 24th unit. Marginal profit dollars per unit