On July 13, the price of carbon black in a large factory in Hebei dropped by 200 yuan/ton. The current price of wet N220 is 9400 yuan/ton, wet N330 is 7800 yuan/ton, wet N550 is 8200 yuan/ton, and wet N660 is 7800 yuan/ton. The company has 10 carbon black production lines with a production capacity of about 300,000 tons/year.