A Truck Full of Melons -- Dickeson

I have a truck with a load capacity of 1,000 melons. There's an area near the Mexican border where they grow the most delicious honeydews you've ever tasted.

In addition to my truck I have $1,000 in free cash. Being an entrepreneur, I drive my truck to that border spot and buy a thousand melons from the farmers for a dollar a piece. I head straight to Phoenix where I sell the honeydews to the wholesaler for $1.50 each. I've just made $500 gross profit. But the trip cost me $250 for expenses. So I netted $250 on my free cash in two days!