Smith and Jones Comprise a Two-Person Economy Refer to the Table Above

Smith and Jones comprise a two-person economy.Their hourly rates of production are shown below. $\begin{array}{ccc}\underline{\text { Good }} & \underline{\text { Smith }} & \underline{\text { Jones } }\\\text { Computers } & 10 & 6 \\\text { Calculators } & 100 & 120\end{array}$
Refer to the table above.The opportunity cost of making an extra calculator for Smith is __________ and for Jones it is __________.

A) 0.10 computers;0.05 computers
B) 10 computers;6 computers
C) 1 computer;0.5 computers
D) 0.6 computers;1.2 computers