31. (5 points) Enrique is self-employed and works in Chicago as a design engineer. During 2019 he traveled to Spain to consult on a project. He spent 2 days traveling, 13 days working, and 2 days sight-seeing. His airfare was $2,800, his meals amounted to $150 per day, and his lodging and incidental expenses were $300 per day. He also incurred $350 for taxicab charges related to business. Enrique's deduction for travel related to this trip is $ (Show your work!)