The answer is $5,000 gain. Can you please show all calculations?

In your portfolio you have $1 million of 20-year, 85/8 percent bonds that are selling at 83.15 (or 8315/32 ) against this position. Because you feel interest rates will rise, you sell 10 bond futures at 81.15 (or 8115/32 ) against this position. Two months later, you decide to close your position. The bonds have fallen to 78 , and the futures contracts are at 75.16 (75 16/32 ). Disregarding margin and transaction costs, what is your gain or loss? a. $500 loss b. breakeven c. $5,000 gain