Marginal cost is the cost of increasing the quantity produced (or purchased) by one unit. If the fixed cost for n products is $15,000 and the marginal cost is $200, and the total cost is $25,000, what is the value of n? Pick one:
A) 30  B) 50  C) 60  D) 80  E) 100
Total cost for n products = fixed cost for n products + n*marginal cost --&gt; $25,000 = $15,000 + n * $200 --&gt; n = 50.   Answer: 50.
<result>B</result>
Marginal cost is the cost of increasing the quantity produced (or purchased) by one unit. If the fixed cost for n products is $15,000 and the marginal cost is $200, and the total cost is $25,000, what is the value of n?