Firm Firm 1 Firm 2 Firm 3 Emissions Marginal Marginal Marginal Reduction Cost Cost Cost 1 $1.00 $1.00 $2.00 2 $1.50 $2.00 $3.00 3 $2.00 $3.00 $4.00 4 $2.50 $4.00 $5.00 5 $3.00 $5.00 $6.00 6 $3.50 $6.00 $700 T $4.00 $700 $8.00 8 $4.50 $8.00 $9.00 9 $5.00 $9.00 $10.00 10 $5.50 $10.00 $11.00