At the end of day 0, you go short in 10 futures contracts; each contract is for a single unit of an underlying commodity with a futures settlement price at the end of day 0 of $180. This is the futures price for you at the end of day 0, therefore there is no marking to the market for you on that day. The initial margin is $9 per contract and the maintenance margin is $7. Over the following three trading days, this futures has end-of-day settlement prices of $181 at t=1, $177 at t=2, $182 at t=3. What is your gain/loss if you close at the end of the day 3 for the ten contracts?

		-$30
		-$20
		-$10
		$10
		$20