3) Suppose you purchase two December futures contracts when the futures price is $1,010 per unit. Each contract is on 100 units and the initial margin per contract is $2,000. The maintenance margin per contract is $1,500. During the next day the futures price decreases to $1,008 per unit. The balance of your margin account at the end of the day is _________ a. $3,800 b. $2,200 c. $4,200 d. $4,400 e. $3,600