What is the fixed cost of BYD's mask production?

Materials, labor, etc. According to the query of Guangming. com. Com, the mask material is mainly rope and face, which is divided into three layers, inside and outside, and it is made manually. Therefore, the fixed cost of BYD mask production includes material cost and labor cost. Masks are divided into air filter masks and air supply masks, which are made of fabrics, filters and non-woven fabrics. Used to prevent or reduce dust in the air from entering the respiratory organs.