Modern translations make this clearer:-
Rev 6:6 CEV I heard what sounded like a voice from somewhere among the four living creatures. It said, "A quart of wheat will cost you a whole day's wages! Three quarts of barley will cost you a day's wages too. But don't ruin the olive oil or the wine."
Rev 6:6 NET Then I heard something like a voice from among the four living creatures saying, "A quart of wheat will cost a day's pay and three quarts of barley will cost a day's pay. But do not damage the olive oil and the wine!"
policymakers might take in trying to address the heat-trapping emissions by the nation’s transportation sector, which consumes 70 percent of the oil used in the United States.