Answer: $80
Explanation:
The opportunity cost is regarded as the real cost of the alternative that was left or forgone.
Based on the information given in the question, the opportunity cost is the free ticket to a Post Malone concert that is worth $80 which was given to me by my friend.
Therefore, the correct option is E.
Answer:

Explanation:
You need to assume that the total <em>expenses</em> were equal to the<em> cost of the supplies</em>, i.e. there were not other expenses but the<em> $1,500 for supplies to sell.</em>
The total income or revenue was <em>$3,700</em>.
The <em>percentage of the expenses to the revenue</em> is:

We will use median to calculate various level of salaries of different employees.
Every individual has incomes and expenditures and some savings for the purpose of preparation of budget. Calculation of wealth can differ accordingly as wealth of the different employees would be different as per their earning.
There would be different employees in each company and taking out calculations on the basis of mean would not give any final result. Mode is the result of expected outcomes and will not give exact results. Hence, median would not be affected by small or large numbers so median would give exact results.
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Tires and gas are products needed for cars. Gas need as fuel for car and tire need as footwear for car. Gas is up and there is no need more footwears for car because these products in machine industry depends from each other.
Answer:
A. $50 in required reserves.
Explanation:
Required reserve is a reserve amount which is required by the regulatory authority to a bank to maintain as a percentage of total deposit. Sometimes the bank reserve extra amount above the requirement to deal with any abnormal transaction. This value is known as the excess reserves.
As per given data
Deposits = $500
Reserves = $200
Required Reserve ratio = 10 percent
Required reserve = Reserve required / Total Deposit
0.1 = Reserve required / $500
Reserve Required = $500 x 0.1
Reserve Required = $50
Excess reserve value = Actual Reserve - Required reserve = $200 - $50 = $150