Suppose the demand curve for steel isQ= 100 -P, wherePis the price per unit of steel andQmeasures millions of units of steel. The private marginal cost of producing steel isMC= 5Q+ 40, while the external marginal cost of producing steel is $12. In a perfectly competitive steel industry, the deadweight loss is:

$200,000.

$750,000.

$2 million.

$12 million.