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