Table 10-5
The following table shows the marginal costs for each of four firms (A, B, C, and D) to eliminate units of pollution from their production processes. For example, for Firm A to eliminate one unit of pollution, it would cost $54, and for Firm A to eliminate a second unit of pollution it would cost an additional $67. 
-Refer to Table 10-5. If the government charged a fee of $84 per unit of pollution, how many units of pollution would the firms eliminate altogether?
Definitions:
Resemblance
The degree of similarity or likeness between two persons, objects, or concepts.
IQ
Intelligence Quotient, a measure of a person's intellectual abilities in relation to their age group.
Identical Twins
Twins who originate from the same fertilized egg, sharing 100% of their genes, and typically having very similar physical appearances.
Intellectual Development
The growth and change in intellectual capabilities such as learning, problem-solving, and decision-making over a person's lifetime.
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Q423: Refer to Figure 10-9. The overuse of