B&K grocery store sells three types of soft drinks: the brand names Al Cola and A2 Cola and the cheaper store brand BK Cola. The price per can for Al, A2, and BK are 80, 70, and 60 cents, respectively. On the average, the store sells no more than 500 cans of all colas a day. Although Al is a recognized brand name, customers tend to buy more A2 and BK because they are cheaper. It is estimated that at least 100 cans of Al are sold daily and that A2 and BK combined outsell Al by a margin of at least 4:2.