How much is the calligraphy work (size 1360mmx34mm) of the sculpture artist Dong Guo worth?

After all, the artist Professor Dong Guo is not a full-time calligrapher. His main achievement is sculpture. There are relatively few calligraphy works on the market, so it is difficult to determine the market price now. Generally, large characters are about 1600, and small characters are about 2000. There are more people buying his characters in the sculpture circle, and the price may be higher.