USD/DEM=(1.6640+0.0203)/(1.6650+0.0205)=1.6843/1.6855
(1)即期付款,考慮到貨幣兌換,改用DEM報價,應報1000*1.6650=166.50DEM
(2)三個月後付款,壹是考慮貨幣兌換成本,二是考慮匯率變動風險,應報1000*1.6855=168.55DEM