A 2 5 : 1B 3 : 1C 3 5 : 1D 4 : 1
A.300×100%+300×200%=900(元)
B.300×200%+300×150%=1 050(元)
C.300×200%+300×300%=1 500(元)
D.300×300%+300×300%=1 800(元)
A.(2000-200)x(1-30%)x1.2%+500x1.2%=21.12(万元)
B.(2000+500)x(1-30%)x1.2%=21(万元)
C.2000x1.2%+500x(1-30%)x1.2%=28.2(万元)
D.2000x(1-30%)x1.2%=16.8(万元)
A.200
B.-200
C.160
D.184
A.200
B.-200
C.160
D.184
A.1100
B.80
C.180
D.1000