The milk silo is a cylinder (with an interior radius of 8 feet and interior height of 20 feet) with a hemisphere on top and a cone (with an interior height of 10 feet) on the bottom. The walls of the silo have 1 foot of insulation to keep the milk cold (this will impact the radius of the shapes only). How much sheet metal is needed to build the exterior? If necessary, round all of the answers to the nearest hundredth.