Answer:
1. Jake can easily determine that the price of the computer is more than the price of the vacation.  ⇒ UNIT OF ACCOUNT
2. Jake has $1,574 in his checking account.  ⇒ STORE OF VALUE
3. Jake writes a check for $1,299. ⇒ MEDIUM OF EXCHANGE
Explanation:
The four functions of money are:
- unit of account: since money is a common denominator, it helps to assign value to different goods and services.
- store of value: you can save money in order to purchase gods and services in the future. 
- medium of exchange: you can purchase and sell goods and services using. money 
- standard of deferred payment: money allows loans that require future payments of both principal and interest. 
 
        
             
        
        
        
Some examples of opportunity costs that should be included in project analysis are that, skilled employees who are moved from an existing project to the new project causing a loss in the existing project.
Opportunity cost refers to what you have to give up to buy what you want in terms of other goods or services. Opportunity cost is a great tool for project selection in many organizations.
The opportunity cost is the difference between the net value of the path that was chosen and the net value of the best alternative that was not chosen. 
There is an example of opportunity cost which should be included in the project analysis. The situation where skilled employees are moved from an existing project to the new project causing a loss in the existing project, should be analyzed.
Hence, the answer was given and explained above.
To learn more about the opportunity cost here:
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Answer:
potential customers who recently purchased camping equipment and four-wheel drive trucks.
Explanation:
- The call to action has a huge potential hidden in reaching out to the customers and making them call for outdoor nature and adventure. 
- The magazine tries to catch the reader's attention by making claims such as tired of sitting in front of your computer.  
- Those people who usually stay at home and are unable to move out due to some reason can use their purchased camping equipment and four-wheel-drive trucks.