On a given Wednesday morning, a short term trader in New York goes short on Canadian $ futures (size C$100,000 per contract) at US $0.8000 per Canadian $. The initial margin is US $ 2,500 and the maintenance margin is $1500. The closing futures price on Wednesday is US $0.8400 per C$, on Thursday close is US $0.8300 per C$, and on Friday close US $0.8340 per C$. The trader unwinds her position on Friday end.

Find the ending account balance on Friday end, including margin account (additions and subtractions).