How much does the hotel usually pay for round-table glass?

According to the picture, it is a glass ring made of 12 mm ordinary glass and has not been tempered. The ex-factory price of the glass factory is: the area multiplied by 70 yuan/m2 plus the periphery of finishing grinding 10 yuan/m (from the picture, the diameter is 1 m: 1 m * 1 m * 70+3.65438).