Northern Shelters manufactures homes, cabins, workshops, and garages. The prebuilt walls, floors, and roofs are assembled on-site. Each year, five new designs are added (and five with low profit margins are dropped). Rank the designs from best to worst. Note that home designs (H) have a life of 5 years; cabins (C), 10 years; workshops (W), 15 years; and garages (G), 20 years. Northern Shelters requires at least a 15% rate of return on all projects.
