Using the information in the table shown, what is the 2009 value of the salary listed in 1979?

Which of the following costs of publishing a book is a fixed cost?

a. author royalties of 5% per book b. the costs of paper and binding c. shipping and postage expenses d. composition, typesetting, and jacket design for the book

Which of the following conditions is not required for price discrimination?

A. Buyers with different elasticities must be physically separate from each other. B. The good or service cannot be profitably resold by original buyers. C. The seller must be able to segment the market, that is, to distinguish buyers with different elasticities of demand. D. The seller must possess some degree of monopoly power.