Exhibit 31-3 Costs of Eliminating: Firm A Firm B Firm C 1st ton of pollution $ 30 $ 50 $ 600 2nd ton of pollution $ 70 $ 90 $ 700 3rd ton of pollution $125 $150 $ 900 4th ton of pollution $200 $250 $1,300 Refer to Exhibit 31-3. What is the cost to Firm A of eliminating 2 tons of pollution? Group of answer choices $100 $200 $700 $425 $1,500