A manufacturer can produce tires at a cost of $10 each. It is estimated that if the tires are sold for p dollars apiece, consumers will buy 1,200 -8p of them each month. Express the manufacturer's monthly profit as a function of price, graph this function, and use the graph to determine the optimal selling price. How many tires will be sold each month at the optimal price? Part 4 out of 4 At the optimal selling price, tires will be sold each month