Consider the sale of two commoditites with demands D1 and D2 and respective unit prices p1 and p2, given by the formulas D1(p1,p2)=p12+2p1580p2D2(p1,p2)=p22+3p2620p1 Which of the following best describes the relationship between these two commodities? Not enouch information is given. They are neither complementary nor competitive commodities They are competitive commodities They are complementary commodities