Text: The marginal cost of mercury reductions by 2015 ranges from $350 million/ton to $432 million/ton, again depending on the scenario.
Entailment: By 2015, mercury reduction's marginal cost is between $350 million a ton to $432 million a ton.
Contradiction: The marginal cost associated with mercury reduction had a range of $300 million a ton to $350 million a ton.