Final answer:
Mike Templin's monthly salary is $3,570.
Step-by-step explanation:
To find Mike Templin's monthly salary, we need to divide his annual salary by 12. Mike's annual salary is $42,840, so to find his monthly salary, we perform the following calculation:
 
Monthly salary = Annual salary / 12
 
Monthly salary = $42,840 / 12 = $3,570
 
Therefore, Mike Templin's monthly salary is $3,570.