Buyer: Disk profit 100 yuan/ton, which is bought and delivered at 16900 yuan/ton, converted into buying at 16800 yuan/ton, but the value-added tax is based on the price standard of 16900 (it seems to be16900)

Seller: the inventory loss is 20 yuan/ton, which is sold and delivered at 16900 yuan/ton, which is converted into 16880 per ton, but the value-added tax is based on the price standard of 16900 (it seems to be16900/..