How much is Zhang Huichen's calligraphy per square meter?

Each calligrapher's works have different prices according to their fame. I don't know much about Mr. Zhang Huichen's calligraphy, but the price of calligraphy is different. Some time ago, I asked Mr. Fu Jianzeng for an inscription because of my work, and the price was about 5,000 square meters. This gentleman's calligraphy style is very distinctive, and he is good at cursive writing, especially left-handed calligraphy. He is currently the vice chairman of China Artists Association. Other details can be found in the information.