Which of the following is not a requirement for successful price discrimination? sellers must be able to separate the market into different consumer groups based on their elasticities of demand. sellers must have some market power. sellers must be able to prevent arbitrage; that is, it must be impossible or prohibitively expensive for low-price buyers to resell to higher-price buyers. sellers must have higher price elasticities than buyers.

Caleb construction (cc) incurs supervisor salaries expense in the construction of homes. if cc manufactures 100 homes in a year, fixed supervisor salaries will be $400,000. with the current construction supervisors, cc's productive capacity is 150 homes in a year. however, if cc is contracts to build more than 150 homes per year, it will need to hire additional supervisors, which are hired as full-time rather than temporary employees. cc's productive capacity would then become 200 homes per year, and salaries expense would increase to $470,000. how would cc’s salaries expense be properly classified? fixed variable mixed stepped curvilinear