The difference between the value an activity generates and the cost of the activity is called the .

Margin

Explanation:

 The margin is the term which is used to refers to the amount of the equity that is basically borrowed from the brokerage company or type of an organization for the purpose of purchasing any type of investment.

The margin count is also refers is the brokerage account as it is one of the act of borrow the money from the other for the purpose of buying the different types of security system.

According to the given question, the difference between the given value and also the cost of the total activity done is known as the margin.    

 Therefore, Margin is the correct answer.

given all the practice it takes to become proficient at writing up ncoer's, , awards, and conselings as well as learning how to become a well rounded   leader , and managing different types of people