On October 7th, Henan Saiteng Environmental Protection Technology Co., Ltd. provided the following quotation for sodium bicarbonate: 1400 yuan per ton. The specifications of the product include: Usage level: food-grade; total alkali content (calculated based on NaHCO3), w/% ≥ 98.8%. The validity period of this quotation is three days. The quoting party is Henan Sentie Environmental Protection Technology Co., Ltd.