Bank A and Bank B have the same cost of providing one ATM withdrawal, which is $2.

Bank A charges customers $2 per ATM withdrawal, but Bank B provides 1 free ATM withdrawal per month. Bank A pays 4% interest on deposits as long as the monthly average is at least $500. Bank B pays 3% regardless of the average balance. Your monthly bank balance is $1,500 except in August to October when it is $500.

Which is the better bank for you if you make 2 ATM transactions a month?