Which of the following markets has the most restrictive geographic boundary?

If a firm produces five chairs with marginal costs of $25, $30, $40, $55, and $75, respectively, and sells them for $80 each, what is the firm's total producer surplus?

A) $400 B) $225 C) $175 D) $150 E) $80

The least expensive way to clean up the environment is for all firms to reduce pollution by an equal percentage

a. True b. False Indicate whether the statement is true or false