Mary Rue, a currency trader, wants to take advantage of possible price discrepancy in the foreign exchange market. She watched the ticker tape on her computer and saw the following quotes.

Germany ask price quotation:$/ = $0.8600

Singapore Bid price quotation: S$/ = S$2.00

U.S bid price quotation: $/S$ = $0.5500

Is there a triangular currency arbitrage opportunity? If so, how much will Mary Rue gain, with a working capital of $1,000,000?