You sell 2 December gold futures contracts when the futures price is $405 per ounce. Each contract is on 119 ounces of gold and the initial margin per contract $2145. The maintenance margin per contract is $4051. During the next seven days the futures price rises slowly to $411 per ounce. What is the balance of your margin account at the end of the seven days?

a) Balance of your margin account is $8102

b) Balance of your margin account is $5718

c) Balance of your margin account is $4290

d) Balance of your margin account is $2859

please show workings