The Gilbert Air-Conditioning Company is considering the purchase of a special shipment of portable air conditioners manufactured in Japan. Each unit will cost Gilbert $70, and it will be sold for $120. Gilbert does not want to carry surplus air conditioners over until the following year. Thus, all surplus air conditioners will be sold to a wholesaler for $40 per unit. Assume that the air conditioner demand follows a normal probability distribution with = 20 and = 8.
