Answer:
What to produce?
Explanation:
A society has to make choices in order to meet the diverse needs of its members. The resources available in all economies are insufficient to meet all needs. Because of this scarcity, a society has to make informed decisions on what to produce at any given.  
Societies make choices on what to produce with the available resource. In every decision, there is a sacrifice to be made.
 
        
             
        
        
        
It doesn't require any skills or special talent to flip burgers.
Hope this helps! :-)
        
             
        
        
        
Those are supply curves and demand curves. Supply curves have to meet the production requirements, while demand curves have to meet the consumer's willingness to pay.
        
             
        
        
        
Answer:
Debit Cash account          $8,400
Credit Sales account         $8,000
Credit Sales tax payable      $400
Being entries to record cash proceeds from sale.
Explanation:
Since total cash received from the sale was $8,400, a debit entry for this amount is posted to the Cash account.
Of the amount received, $400 is for sales tax. This is a liability to the organization and as such a credit entry for sales tax payable of $400 is recorded until it is remitted. 
The balance of $8000 is the actual amount to be recognized as sales.