Marginal private cost is the cost of producing....?of good or service that is borne by the....?of that good or service Marginal external cost is the cost of producing....?of good or service that falls on people other than the.... A. An additional unit;consumer the total quantity; consumer B. An additional unit; producer the total quantity; producer C. An additional unit; producer an additional unit; producer D. Th total quantity; producer and additional unit; government