21. If Nike sells basketball shoes for $150 per pair and the cost of producing and selling a pair of basketball shoes is $15, Nike's profit per unit on a pair of basketball shoes is: O $135. O $160 O $10. O $165. 22. Profit per unit equals: O price per unit minus cost per unit. O cost per unit minus price per unit. Oprice per unit divided by cost per unit. O price per unit minus the nominal wage rate. 24. An economic policy maker would rank a O negative supply O positive supply O negative demand O positive demand. shock as the MOST preferred type. 25. In the long run, as the economy self-corrects, a decrease in aggregate demand, all other things unchanged, will cause the price level to O fall; remain stable O rise; remain stable fall; decrease Orise; increase and potential output to