it's b (: it's simply regular butter but with the milk solids removed. 
 
        
                    
             
        
        
        
Based on the information given for her to complete her letter, she must deposit D) $12,000.
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Deposit:</h3>
Using this formula
Deposited amount=Amount invested-Original investment
Where:
Amount invested=$25,000
Original investment=$13,000
Let plug in the formula
Deposited amount=$25,000-$13,000
Deposited amount=$12,000
Inconclusion for her to complete her letter, she must deposit D) $12,000.
Learn more deposit here:brainly.com/question/1752098
 
        
             
        
        
        
Answer
Before I answer this question, you must note that the equilibrium price is created by both the amount supplied of a certain product as well as how much "customers" there are (or the amount that is bought in all).  This however, is usually not taking account any potential competitors. 
For example, let say that the price in creating the product (or buying) is $15. This means that right now, the company loses $15 for one of the products. To make a profit, the selling price must be >$15. However, (unless they are a monopoly, such as, for example, electrical companies) there are competitors that they must fight with to get customers. Of course, there are other things that can affect the price, depending on the demographic and area. 
So how does supply and demand affect the equilibrium price? The limits of the supply & the amount of demand would help determine the price by the amount of people buying and the supply of the product.
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