An organization of producers that limits the amount of a good produced is known as a

Suppose a record company produces both swing and rhythm & blues music. An increase in the market demand for swing music therefore tends to

A) increase the demand for rhythm & blues music. B) increase the cost of producing rhythm & blues music. C) decrease the cost of producing rhythm & blues music. D) leave the cost of producing swing music unchanged.

A monopolist can sell 10 wangdoodles if he charges $10 per wangdoodle and 11 wangdoodles if he charges $9 . The MR from selling the 11th wangdoodle is

a. ?$1. b. $1. c. $9. d. $99.