Q8 A manufacturer makes two models of an item, standard and deluxe. It costs $40 to manufacture the standard model and $60 for the deluxe. A market research firm estimates that if the standard model is priced at x dollars and the deluxe at y dollars, then the manufacturer will sell 500(y - x) of the standard items and 45,000 + 500(x - 2y) of the deluxe each year. How should the items be priced to maximize the profit