A one-product company finds that its profit, P, in millions of dollars, is given by the following equation where a is the amount spent on advertising, in millions of dollars, and p is the price charged per item of the product, in dollars. P(a,p)=4ap+ 120p-20p-ap-120 Find the maximum value of P and the values of a and p at which it is attained. The maximum value of P is attained when a is $ million and p is $ The maximum value of P is $million.