How much does a calligraphy cost?

I don't know much about calligraphy, but some time ago, I asked Mr. Fu Jianzeng to write a picture because of my work needs. The price is around 5000 square feet. This gentleman has a distinctive artistic style of calligraphy and is good at cursive writing, especially left-handed calligraphy. He is currently the vice chairman of China Artists Association. You can contact him for other details.