Smith and Jones comprise a two-person economy. Their hourly rates of production are shown below.The opportunity cost of making a calculator for Smith is _ and for Jones it is _.
A.0.6 computers; 1.2 computers
B.10 computers; 20 computers
C.1 computer; 0.5 computers
D.0.10 computers; 0.05 computers
正确答案：0.10 computers; 0.05 computers
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