The private cost adds the external cost equals to the social cost.

违法社会成本是违法私人成本和外部成本之和。

youdao

Private cost and benefit deviates from social cost and benefit, this is one of the most common problem for economic society.

私人成本和收益与社会成本和收益相背离是经济社会最普遍的问题之一。

youdao

The charge service during transportation such as lundry fee, phone call cost, beverage, cigarette, pay TV, luggage service and other private cost.

交通工具上非免费餐饮费、洗衣、理发、电话、饮料、烟酒、付费电视、行李搬运、自由活动期间等私人费用；

youdao

Prices differ from school to school, but public colleges and universities usually cost less than private ones.

VOA: special.2009.01.22

Since November the stories about his private life have cost him millions of dollars in product deals.

VOA: special.2010.04.10

The private-public partnerships are designed to increase the availability of low cost vaccines in poor areas.

VOA: special.2010.03.29

Your argument is that almost all administrative cost is fixed and thus on what you define as total cost the private sector administrative cost on a per member basis is lower.

FORBES: The Myth of Medicare's 'Low Administrative Costs'

Today, used private planes cost about 50% less than they did in 2007.

FORBES: Trump Wants You To Know He Has A Big New Used Plane

In contrast, the likely private market cost of very long-term funding for Ireland (if it was available at all) would probably be high, perhaps about 6 percent.

FORBES: How Much Would Ireland Benefit from Replacing the Promissory Notes with a Long-Term Bond?