The helmet manufacturer's biggest sellers are the black and silver helmets with the standard house-brand decal. White and red helmets account for approximately 30 percent of sales. The organization has decided on replenishment inventory models for the helmet shells. Should the organization use the same replenishment inventory model for all the helmet shells or should it use one replenishment model for the black and silver helmets and another for the white and red helmets? Explain your choice.