How much is the school buying my art for?

I go to a Middle School in New York State. I am in 8th grade. I am in Studio in art, and my school is purchasing my art work. It is a "masterpiece" of Pablo Pico's "Brick Factory At Tortosa." I am getting the check on May 28th. How much do you think I will get? The school is framing it and hanging it in the hall lobby.