解:原料外匯成本(CIF)=FOB+F+I
=FOB+F+CIF*I%
=1000+50+1000*0.001
=1051
原料外匯凈收入(FOB )=CIF-F-I
=CIF-F-110%CIF*I%
=1700-50-1.1*1700*0.001
=1648.1
外匯增值率=(1648.1-1051)/1051=56.8%
4.出口換匯成本=出口總成本/出口外匯凈收入
=(5000+500)/(1000-100-1000×110%×0.1%)
=6.12元人民幣/美元