Walmart Inc. has imported USS 1 million worth of goods from a Swiss corporation. The spot exchange rate is now sf 2.5000/s yet the payment is not due until three months later. The Swiss exporter allows Walmart to choose the invoicing currency now. If Walmart pays in dollars, it should pay $ 1 million. If Walmart chooses to pay in Swiss francs, it should pay sf 2.5 million. The treasurer of Walmart is predicting that the dollar will appreciate substantially against the Swiss francs in one or two months. Under these circumstances, which currency should Walmart choose as the invoicing currency? O US dollar Swiss franc Indifferent