The following table shows the marginal costs for each of fourfirms (A, B, C, and D) to eliminate units of pollution from their productionprocesses. For example, for Firm A toeliminate one unit of pollution, it would cost $54, and for Firm A to eliminatea second unit of pollution it would cost an additional $67. Firm Unit to be eliminated A B C D First unit 54 57 54 62 Second unit 67 68 66 73 Third unit 82 86 82 91 Fourth unit 107 108 107 111 Table 10-5 Refer to Table 10-5. If the governmentcharged a fee of $69 per unit of pollution, how many units of pollution wouldthe firms eliminate altogether?