The finite group M is an H-group if every subgroup in M is an M-subgroup, and we say M is a j-group if every subgroup in M is a j-subgroup. In this study, we look at some of the characteristics of some dihedral group subgroups. As a result, we have student relationships between several subgroups, the quantity demand and investment in research and development, while the other model focuses on a more realistic relationship between the quantity demand and the price.