["Find total units: 9 + 5 = 14 units. Each unit = 280 / 14 = 20 pieces.","Indoor = 9 x 20 = 180. Wooden:metal = 5:4 so wooden indoor = 5/9 x 180 = 100.","Outdoor = 5 x 20 = 100. Wooden:metal = 1:4 so wooden outdoor = 1/5 x 100 = 20. Total wooden = 100 + 20 = 120."]