What is the calligraphy price of the famous painter Chen?

Chen Lao is a master of contemporary calligraphy and painting, and he is very famous in Shandong. In his later years, Chen Lao was famous in the domestic art world, especially in landscape painting. His unique style is called "Chen Shanshui" by calligraphy and painting circles, and his appreciation of flower-and-bird figure painting, calligraphy and seal cutting poetry is excellent. He is a famous contemporary artist. Chen Lao's traditional Chinese painting is expensive, but his calligraphy is slightly lower. The price of calligraphy with flat feet is 3000 yuan, and that of four feet should be 12000 yuan.