Suppose you want to buy $ 10,000,000 worth of Euros and then sell them five minutes later for U.S. dollars. How much of your $10,000,000 would be "eaten" by the bid-ask spread, given the following bid-ask prices. BidAsk S($ per €1) 1.136406 $ 5,279.83 $5,279.83 $ 6,000,00 $ 5,277.04 $2,152,34