How much should you charge to paint a 10' 10' wall with a beach scene in a kitchen?

How much should you charge to paint a 10' 10' wall with a beach scene in a kitchen?
That would depend on time it would take to paint the scene, how much would the materials to paint the scene cost, what is involved with travel to and from the location of the kitchen. Once that is decided add opinion of talent for the profit piece.