Smith and Jones comprise a two-person economy. Their hourly rates of production are shown below.Suppose Smith and Jones begin by producing 16 computers and 0 calculators per hour. If they wish to produce 14 computers and 40 calculators per hour efficiently, then Smith should spend _, and Jones should spend _.
A.45 minutes on computers and 15 on calculators; 1 hour on calculators
B.1 hour on computers; 20 minutes on computers and 40 minutes on calculators
C.30 minutes on each; 30 minutes on each
D.1 hour on computers; 40 minutes on computers and 20 minutes on calculators
正确答案:1 hour on computers; 40 minutes on computers and 20 minutes on calculators