Source: p 191, Question 9.7b, 9.7c, Principles of Microeconomics, 7 Ed, 2014, by NG Mankiw
Consider a country that imports a good. True or false. Explain your answer.
b) “If demand is perfectly inelastic, there are no gains from trade.”
c) “If demand is perfectly inelastic, consumers do not benefit from trade.”
Please explain if this Best Answer is wrong? It claims that b) and c) are true. Yet my own work below shows a surplus of $+B$ after imports $\implies$ Gains from importing $\implies$ B and C are false.
Please feel free to correct my graph, but please also explain the intuition.
I wish to develop intuition, rather than be mechanically engrossed in graphs.