What is the total surface area of this rectangular prism? (L × W) + (L × W) + (L × W) + (L × H) + (H × W) + (H × W) (L × W) + (L × W) + (L × H) + (L × H) + (H × W) + (H × W) (L × W) + (L × W) + (L × H) + (L × H) + (L × H) + (H × W) (L × W) + (L × W) + (L × H) + (H × W) + (H × W) + (H × W)