Why is the price difference between Conan cartoon and black and white very big?

Cost problem. Conan comics have many colors, high cost, few colors in black and white version and low cost, which leads to different prices, which belongs to the cost problem. Conan, a detective Conan, is a cartoon work created by G?sh? Aoyama, which began to be serialized in the 5th issue of Weekly Youth Sunday with the number 1994.