Answer:
I would save $348 in two years.
Step-by-step explanation:
Bank A charges a fixed monthly fee of $18 for unlimited transactions while bank B charges a fixed monthly fee of $3.50 but restricted to 20 transactions per month.
If someone expects to make less than 20 transactions per month, then they should select bank B.
If they select bank B, they would save $18.00 - $3.50 = $14.50 per month, and given two years have 24 months, they would save 24*$14.50 = $348 in two years.