An investor enters into a forward contract to buy 5,000 barrels of oil at $80 a barrel in three months. Two months later, suppose that the spot price for oil is $83 a barrel, and the one-month interest rate is 1 % continuously compounded. Assuming that there are no storage costs, what is the value of the contract the investor holds after two months?

Note:I would appreciate it if any of you guys could show the equation so I can understand the problem. Thank you.