（3。xvii。9）Itseems，therefore，tobefullyestablished，thatthebusinessofproductionand
exchange，iflefttochooseitsownchannels，issuretochoosethose，whicharemost
advantageoustothecommunity。Itissuretochoosethosechannels，inwhichthecommodities，
whichthecommunitydesirestoobtain，areobtainedwiththesmallestcost。Toobtainthe
commodities，whichmandesires，andtoobtainthemwiththesmallestcost，isthewholeofthe