Hillary considers herself a shrewd commodities investor. She bought a May cotton contract (50,000 pounds) at $0.6736 a pound, and later sold it at $0.7021 a pound. What were her profit and her return on invested capital if her initial margin was $1,320 and the size of a cotton futures contract is 50,000 pounds of cotton?

Hillary's profit is $

(Round to the nearest dollar.)