The opportunity cost of buying two more pairs of shoe is 1 suit.
<h3>What is opportunity cost?</h3>
Opportunity cost is an economic term for expressing cost, in terms of foregone alternative.
Given the information above,
Her opportunity cost of consuming one extra pair of shoes instead of one suit
= $50 / $100
= 0.5 suit or half a suit
Her opportunity cost of consuming one suit instead of a pair of shoes
= $100 / $50
= 2 pairs of shoes
Hence, the opportunity cost of consuming 2 more pairs of shoes
= 0.5 suit x 2
= 1 suit
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The answer is B. the ad shows bars of soap and and a bathroom sink, i just took the test
The correct option is (c) no legal barriers prevent a firm from entering an industry.
No legal barriers:
Non-legal writing non-legal careers anything unrelated to the law or the legal profession.
Because, the industry is free and flexible for enter and exit and no other government interventions will be applicable in that free entry no barriers is there and movability will be 
for any industry.
Not option (a) Because, the government really levies admission fees for certain types of businesses due to the legal issues surrounding certain businesses and fields, hence they never reimburse the fees.
Not option (b) because, Because it is a government supported program and private businesses cannot participate for free, only semi-government or completely government can do the same, government financed research never helps in sustaining in lower cost patients and hurdles.
Not option (c) because, If a company is operating a successful and reliable business, its marginal cost cannot be zero, and thus will normally not provide free entrance into any industry or type of business.
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Answer:
The best way to find terms of trade that will ensure that two entities are in the best terms of trade will be to look at the opportunity costs of the various products they produce.
A high opportunity cost in one product relative to that of the other entity means the entity with the higher opportunity cost should be trading with the entity with the lower opportunity cost and vice versa.
For example, assume that an entity "A" produces both rice and beans whilst an entity "B" also produces rice and beans too.
If the opportunity cost to A of producing Beans is 300 bags of rice whilst the opportunity cost to B of producing Beans is 120 bags of rice, and the opportunity cost to A of producing rice is 180 bags of beans whilst it is 250 bags of beans to B, the principles of comparative advantage require that A should focus more on producing rice and purchase beans from B whilst B should focus more on producing beans and purchase rice from A.
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