Answer:
Step-by-step explanation:
From the problem statement, we can setup the following equation:
[tex]12S + 5700 = 91400[/tex]
where [tex]S[/tex] is the monthly salary. Solving for [tex]S[/tex] will give us the answer:
[tex]12S = 85700[/tex]
[tex]S = 7141.67[/tex]