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) 1 hour on computers; 40 minutes on computers and 20 minutes 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) 45 minutes on computers and 15 on calculators; 1 hour on calculators A) B) D) C)