This question is incomplete. The complete question, answer & explanation for this question is given in the attachment below.
Here are the five basic principles found in a free enterprise system:
1) Governments have no control over the buying & selling of products & services.
2) The "invisible hand" of market supply and demand occurs
3) Governments may only be involved with to provide education, the army, and public health services (and other merit goods)
4) Governments may only provide public goods (such as lampposts) which bring no profit for sales people, as you cannot stop people from using those items.
5) Usually, there's a great difference in the distribution of wealth
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<span>They will vary the prices of their cars based on the supply and demand they are experiencing. This is done as a way of getting the maximum amount of revenue when demand is lowered and pricing higher at periods in which the demand for cars is higher.</span>
The amount of after-tax cash flows for Company C on its investment is $37,500.
<h3>What is an after-tax income?</h3>
After-tax income is the gains earned by the company in an accounting year that remain after adjusting its income taxes.
Given values:
Revenues: $10,000
Savings: $40,000
Total investment income: $50,000 ($10,000 + $40,000)
Rate of tax: 25%
Computation of after-tax cash flows of an investment project:

Therefore, $37,500 is the value of after-tax ash flows being earned from the investment in equipment.
Learn more about the after-tax income in the related link:
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Answer:
The correct answer is letter "A": total value from trade in a market.
Explanation:
Canadian economist Alex Tabarrok (born in 1966) explains social surplus as the sum of consumer surplus, producer surplus, and bystanders surplus. Tabarrok takes an integrative approach in consumer surplus by stating <em>social surplus encompasses every economic trade in the market rather than only consumers and producers surplus.</em>
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Besides, Tabarrok believes when there are major external costs or benefits, the market will not reach its social surplus.