Firm Current carbon emissions (tons) Cost of reducing emissions by 1 ton ($) A 80 150 B 100 200 C 70 50 a. Firm A will (Click to select) buy 20 emission permits from sell 20 emission permits to buy 40 emission permits from sell 40 emission permits to Firm C. Firm B will (Click to select) sell 40 emission permits to sell 20 emission permits to buy 40 emission permits from buy 20 emission permits from Firm C. Instructions: Round your answer to the nearest whole number. b. To break even, the selling firm must receive $.