Every year, roughly 25{,}000{,}00025,000,00025, comma, 000, comma, 000 kilograms (\text{kg})(kg)left parenthesis, start text, k, g, end text, right parenthesis of hair is cut in the United States. Each kilogram of hair contains about 0.0002 \text{ kg}0.0002 kg0, point, 0002, start text, space, k, g, end text of zinc, and each kilogram of zinc is worth about 444 dollars.