To calculate the art commission:
\[ AC = AT \times HR \]
Where:
An art commission is the fee charged by an artist to create a custom piece of artwork. This fee is usually based on the time spent creating the artwork and the artist's hourly rate.
Let's assume the following values:
Using the formula:
\[ AC = 10 \times 25 = 250 \]
The Art Commission is $250.