On a given Monday morning, a short term trader in Chicago goes short on Canadian s futures (size C$100,000 per contract) at US $0.8200 per Canadian S. The initial margin is US $ 3,500 and the maintenance margin is $2,500. The closing futures price on Monday is US $0.8400 per CS, on Tuesday close is US $0.8300 per Cs, and on Wednesday close US $0.8340 per Cs. The trader unwinds her position on Wednesday end. Find the ending account balance on Wednesday end, including margin account (additions and subtractions) $1,600 $2,100 b. $3,600 $4,100