X - number of customers

There can't be a fraction of the number of people, so there must be some mistake in the question.
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Answer:
Job A=40 hours=73.50  job=B=50hours=120.40 
Step-by-step explanation:
 
        
             
        
        
        
The answer is B because you have to do the opposite which means you have to subtract -9-2=-11