Question 30 Every time Amazon.com buys or sells one more product, Amazon managers classify that as: O Marginal Costs and Marginal Revenues O Fixed Costs and Fixed Revenues O Variable Costs and Variable Revenues Question 31 2.5 pts 2.5 pts A manager wanting to show workers how managing well can increase productivity and benefit workers and the region should emphasize on Adam Smith's idea of O The Invisible Hand The Efficiency/Effectiveness paradox O The Climate Change Hypothesis