When the balance is $600, the local bank would charge: 600 x 0.02 = $12
This means if the balance is higher the $600, the local bank would charge more than $12.
The answer would be the second choice: The fee at the local bank will be more than the fee at the local credit union only when the account balance is more than $600.
Yes it is correct because you would multiply 30 by 7 which equals 210 + the extra 20 dollars / 50 dollars (idk).. she will have more than enough though