On Sep $19$th$,$ you sold short $5,200$ shares of AAPL's stock at $$156$ per share. Your initial margin requirement is $50$ percent. Assuming there was no commission and interest fees and no dividends involved. After two weeks, AAPL's price went up to $$190$ per share, and you received a margin call from the broker.

If you close this position, then your return would be