July 13: ① Price: Currently, the manufacturer offers a price of 114 yuan/heavy box for 4mm, a price of 113 yuan/heavy box for 5-10mm, a price of 113 yuan/heavy box for 12mm, a price of 124 yuan/heavy box for mirror making grade, and a price of 132 yuan/heavy box for electronic grade. First-class products, including tax, the specific price is subject to the actual transaction.② Production: There are 2 production lines with a daily melting capacity of 700/900 tons.